211221012210102 has 16 divisors (see below), whose sum is σ = 469380027133680. Its totient is φ = 70407004070016.

The previous prime is 211221012210067. The next prime is 211221012210199. The reversal of 211221012210102 is 201012210122112.

211221012210102 is a `hidden beast` number, since 211 + 221 + 0 + 1 + 221 + 0 + 10 + 2 = 666.

It is a super-2 number, since 2×211221012210102² (a number of 29 digits) contains 22 as substring.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1955750113003 + ... + 1955750113110.

It is an arithmetic number, because the mean of its divisors is an integer number (29336251695855).

Almost surely, 2^{211221012210102} is an apocalyptic number.

211221012210102 is an abundant number, since it is smaller than the sum of its proper divisors (258159014923578).

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

211221012210102 is a wasteful number, since it uses less digits than its factorization.

211221012210102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3911500226124 (or 3911500226118 counting only the distinct ones).

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

Adding to 211221012210102 its reverse (201012210122112), we get a palindrome (412233222332214).

The spelling of 211221012210102 in words is "two hundred eleven trillion, two hundred twenty-one billion, twelve million, two hundred ten thousand, one hundred two".