21021211022102 has 32 divisors (see below), whose sum is σ = 31721251995648. Its totient is φ = 10447655400000.

The previous prime is 21021211022047. The next prime is 21021211022111. The reversal of 21021211022102 is 20122011212012.

It is a super-2 number, since 2×21021211022102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 805058027 + ... + 805084137.

It is an arithmetic number, because the mean of its divisors is an integer number (991289124864).

Almost surely, 2^{21021211022102} is an apocalyptic number.

21021211022102 is a deficient number, since it is larger than the sum of its proper divisors (10700040973546).

21021211022102 is a wasteful number, since it uses less digits than its factorization.

21021211022102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29756.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21021211022102 its reverse (20122011212012), we get a palindrome (41143222234114).

The spelling of 21021211022102 in words is "twenty-one trillion, twenty-one billion, two hundred eleven million, twenty-two thousand, one hundred two".