1200921043572 has 36 divisors (see below), whose sum is σ = 3140339513220. Its totient is φ = 386503324032.

The previous prime is 1200921043541. The next prime is 1200921043573. The reversal of 1200921043572 is 2753401290021.

1200921043572 is a `hidden beast` number, since 1 + 2 + 0 + 0 + 9 + 210 + 435 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 655798714596 + 545122328976 = 809814^2 + 738324^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1200921043572² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200921043573) 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, 575152713 + ... + 575154800.

It is an arithmetic number, because the mean of its divisors is an integer number (87231653145).

Almost surely, 2^{1200921043572} is an apocalyptic number.

1200921043572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1200921043572 is an abundant number, since it is smaller than the sum of its proper divisors (1939418469648).

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

1200921043572 is a wasteful number, since it uses less digits than its factorization.

1200921043572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150307552 (or 1150307547 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 1200921043572 in words is "one trillion, two hundred billion, nine hundred twenty-one million, forty-three thousand, five hundred seventy-two".