210021012120101 has 16 divisors (see below), whose sum is σ = 258510927421824. Its totient is φ = 166155346056384.

The previous prime is 210021012120097. The next prime is 210021012120109. The reversal of 210021012120101 is 101021210120012.

It is a cyclic number.

It is not a de Polignac number, because 210021012120101 - 2² = 210021012120097 is a prime.

It is a super-2 number, since 2×210021012120101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021012120109) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 104029910 + ... + 106029543.

It is an arithmetic number, because the mean of its divisors is an integer number (16156932963864).

Almost surely, 2^{210021012120101} is an apocalyptic number.

It is an amenable number.

210021012120101 is a deficient number, since it is larger than the sum of its proper divisors (48489915301723).

210021012120101 is a wasteful number, since it uses less digits than its factorization.

210021012120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210070460.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210021012120101 its reverse (101021210120012), we get a palindrome (311042222240113).

The spelling of 210021012120101 in words is "two hundred ten trillion, twenty-one billion, twelve million, one hundred twenty thousand, one hundred one".