21122111202102 has 12 divisors (see below), whose sum is σ = 45764574271260. Its totient is φ = 7040703734028.

The previous prime is 21122111202077. The next prime is 21122111202107. The reversal of 21122111202102 is 20120211122112.

21122111202102 is a `hidden beast` number, since 211 + 221 + 1 + 1 + 20 + 210 + 2 = 666.

It is a super-2 number, since 2×21122111202102² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1173450622339 = 21122111202102 / (2 + 1 + 1 + 2 + 2 + 1 + 1 + 1 + 2 + 0 + 2 + 1 + 0 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122111202107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 586725311152 + ... + 586725311187.

It is an arithmetic number, because the mean of its divisors is an integer number (3813714522605).

Almost surely, 2^{21122111202102} is an apocalyptic number.

21122111202102 is an abundant number, since it is smaller than the sum of its proper divisors (24642463069158).

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

21122111202102 is a wasteful number, since it uses less digits than its factorization.

21122111202102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173450622347 (or 1173450622344 counting only the distinct ones).

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

Adding to 21122111202102 its reverse (20120211122112), we get a palindrome (41242322324214).

The spelling of 21122111202102 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred eleven million, two hundred two thousand, one hundred two".