1200312021132 has 72 divisors (see below), whose sum is σ = 3561286144416. Its totient is φ = 333677470464.

The previous prime is 1200312021017. The next prime is 1200312021133. The reversal of 1200312021132 is 2311202130021.

1200312021132 is a `hidden beast` number, since 1 + 200 + 312 + 0 + 21 + 132 = 666.

It is a super-2 number, since 2×1200312021132² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1200312021133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64357473 + ... + 64376120.

Almost surely, 2^{1200312021132} is an apocalyptic number.

1200312021132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1200312021132 is an abundant number, since it is smaller than the sum of its proper divisors (2360974123284).

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

1200312021132 is a wasteful number, since it uses less digits than its factorization.

1200312021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128733647 (or 128733642 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1200312021132 its reverse (2311202130021), we get a palindrome (3511514151153).

The spelling of 1200312021132 in words is "one trillion, two hundred billion, three hundred twelve million, twenty-one thousand, one hundred thirty-two".