21212113202010 has 96 divisors (see below), whose sum is σ = 55266917891328. Its totient is φ = 5644732976640.

The previous prime is 21212113201999. The next prime is 21212113202057. The reversal of 21212113202010 is 1020231121212.

21212113202010 is a `hidden beast` number, since 2 + 121 + 21 + 1 + 320 + 201 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133505715 + ... + 133664505.

It is an arithmetic number, because the mean of its divisors is an integer number (575697061368).

Almost surely, 2^{21212113202010} is an apocalyptic number.

21212113202010 is an abundant number, since it is smaller than the sum of its proper divisors (34054804689318).

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

21212113202010 is a wasteful number, since it uses less digits than its factorization.

21212113202010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161900 (or 161897 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21212113202010 its reverse (1020231121212), we get a palindrome (22232344323222).

The spelling of 21212113202010 in words is "twenty-one trillion, two hundred twelve billion, one hundred thirteen million, two hundred two thousand, ten".