1212312134100 has 144 divisors (see below), whose sum is σ = 3536988618240. Its totient is φ = 320580374400.

The previous prime is 1212312134087. The next prime is 1212312134101. The reversal of 1212312134100 is 14312132121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212312134101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57328129 + ... + 57349271.

It is an arithmetic number, because the mean of its divisors is an integer number (24562420960).

Almost surely, 2^{1212312134100} is an apocalyptic number.

1212312134100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212312134100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1768494309120).

1212312134100 is an abundant number, since it is smaller than the sum of its proper divisors (2324676484140).

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

1212312134100 is a wasteful number, since it uses less digits than its factorization.

1212312134100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22750 (or 22743 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1212312134100 its reverse (14312132121), we get a palindrome (1226624266221).

The spelling of 1212312134100 in words is "one trillion, two hundred twelve billion, three hundred twelve million, one hundred thirty-four thousand, one hundred".