1212002202100 has 36 divisors (see below), whose sum is σ = 2630312561548. Its totient is φ = 484751520000.

The previous prime is 1212002202071. The next prime is 1212002202109. The reversal of 1212002202100 is 12022002121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 12285062244 + 1199717139856 = 110838^2 + 1095316^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212002202109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 378040 + ... + 1602160.

Almost surely, 2^{1212002202100} is an apocalyptic number.

1212002202100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212002202100 is an abundant number, since it is smaller than the sum of its proper divisors (1418310359448).

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

1212002202100 is a wasteful number, since it uses less digits than its factorization.

1212002202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234036 (or 1234029 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1212002202100 its reverse (12022002121), we get a palindrome (1224024204221).

The spelling of 1212002202100 in words is "one trillion, two hundred twelve billion, two million, two hundred two thousand, one hundred".