21202111120212 has 72 divisors (see below), whose sum is σ = 60046601395872. Its totient is φ = 6251236689600.

The previous prime is 21202111120159. The next prime is 21202111120247.

21202111120212 is a `hidden beast` number, since 2 + 120 + 211 + 1 + 120 + 212 = 666.

21202111120212 is nontrivially palindromic in base 10.

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, 723508114 + ... + 723537417.

Almost surely, 2^{21202111120212} is an apocalyptic number.

21202111120212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21202111120212 is an abundant number, since it is smaller than the sum of its proper divisors (38844490275660).

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

21202111120212 is a wasteful number, since it uses less digits than its factorization.

21202111120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447045589 (or 1447045584 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

It can be divided in two parts, 2120211 and 1120212, that added together give a palindrome (3240423).

The spelling of 21202111120212 in words is "twenty-one trillion, two hundred two billion, one hundred eleven million, one hundred twenty thousand, two hundred twelve".