210122011021 has 12 divisors (see below), whose sum is σ = 228683571732. Its totient is φ = 192974186496.

The previous prime is 210122010983. The next prime is 210122011063. The reversal of 210122011021 is 120110221012.

It can be written as a sum of positive squares in 6 ways, for example, as 27121149225 + 183000861796 = 164685^2 + 427786^2 .

It is not a de Polignac number, because 210122011021 - 2⁷ = 210122010893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210122010992 and 210122011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210122018021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3122356 + ... + 3188941.

It is an arithmetic number, because the mean of its divisors is an integer number (19056964311).

Almost surely, 2^210122011021 is an apocalyptic number.

It is an amenable number.

210122011021 is a deficient number, since it is larger than the sum of its proper divisors (18561560711).

210122011021 is a wasteful number, since it uses less digits than its factorization.

210122011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6311520 (or 6311507 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210122011021 its reverse (120110221012), we get a palindrome (330232232033).

The spelling of 210122011021 in words is "two hundred ten billion, one hundred twenty-two million, eleven thousand, twenty-one".