204120213012 has 72 divisors (see below), whose sum is σ = 520494647400. Its totient is φ = 67446005760.

The previous prime is 204120212983. The next prime is 204120213053. The reversal of 204120213012 is 210312021402.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15776364816 + 188343848196 = 125604^2 + 433986^2 .

It is a super-2 number, since 2×204120213012² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1900114 + ... + 2004662.

It is an arithmetic number, because the mean of its divisors is an integer number (7229092325).

Almost surely, 2^204120213012 is an apocalyptic number.

It is an amenable number.

204120213012 is an abundant number, since it is smaller than the sum of its proper divisors (316374434388).

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

204120213012 is a wasteful number, since it uses less digits than its factorization.

204120213012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105033 (or 105028 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 204120213012 its reverse (210312021402), we get a palindrome (414432234414).

The spelling of 204120213012 in words is "two hundred four billion, one hundred twenty million, two hundred thirteen thousand, twelve".