1212443232100 has 81 divisors (see below), whose sum is σ = 2652367175787. Its totient is φ = 481070554560.

The previous prime is 1212443232097. The next prime is 1212443232149. The reversal of 1212443232100 is 12323442121.

The square root of 1212443232100 is 1101110.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 361857590116 + 850585641984 = 601546^2 + 922272^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1640653531 + ... + 1640654269.

Almost surely, 2^{1212443232100} is an apocalyptic number.

1212443232100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212443232100 is the 1101110-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212443232100

1212443232100 is an abundant number, since it is smaller than the sum of its proper divisors (1439923943687).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212443232100 is an frugal number, since it uses more digits than its factorization.

1212443232100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Multiplying 1212443232100 by its sum of digits (25), we get a square (30311080802500 = 5505550²).

1212443232100 divided by its sum of digits (25) gives a square (48497729284 = 220222²).

Adding to 1212443232100 its reverse (12323442121), we get a palindrome (1224766674221).

The spelling of 1212443232100 in words is "one trillion, two hundred twelve billion, four hundred forty-three million, two hundred thirty-two thousand, one hundred".