210211010121 has 16 divisors (see below), whose sum is σ = 325102459904. Its totient is φ = 118327731984.

The previous prime is 210211010117. The next prime is 210211010171. The reversal of 210211010121 is 121010112012.

210211010121 = 134² + 135² + ... + 8575².

210211010121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 210211010121 - 2² = 210211010117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210211010097 and 210211010106.

It is not an unprimeable number, because it can be changed into a prime (210211010171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74700445 + ... + 74703258.

It is an arithmetic number, because the mean of its divisors is an integer number (20318903744).

Almost surely, 2^210211010121 is an apocalyptic number.

210211010121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210211010121 is a deficient number, since it is larger than the sum of its proper divisors (114891449783).

210211010121 is a wasteful number, since it uses less digits than its factorization.

210211010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149403780.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 210211010121 its reverse (121010112012), we get a palindrome (331221122133).

The spelling of 210211010121 in words is "two hundred ten billion, two hundred eleven million, ten thousand, one hundred twenty-one".