21120020112202 has 24 divisors (see below), whose sum is σ = 35076025494468. Its totient is φ = 9529936067520.

The previous prime is 21120020112133. The next prime is 21120020112221. The reversal of 21120020112202 is 20221102002112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21103283256561 + 16736855641 = 4593831^2 + 129371^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 318480753 + ... + 318547060.

Almost surely, 2^{21120020112202} is an apocalyptic number.

21120020112202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21120020112202 is a deficient number, since it is larger than the sum of its proper divisors (13956005382266).

21120020112202 is a wasteful number, since it uses less digits than its factorization.

21120020112202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637027974 (or 637027963 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21120020112202 its reverse (20221102002112), we get a palindrome (41341122114314).

The spelling of 21120020112202 in words is "twenty-one trillion, one hundred twenty billion, twenty million, one hundred twelve thousand, two hundred two".