210202211112121 has 16 divisors (see below), whose sum is σ = 223934001883200. Its totient is φ = 196737329150208.

The previous prime is 210202211112119. The next prime is 210202211112169. The reversal of 210202211112121 is 121211112202012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 210202211112121 - 2¹ = 210202211112119 is a prime.

It is a super-3 number, since 3×210202211112121³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210202211118121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139504285 + ... + 141003013.

It is an arithmetic number, because the mean of its divisors is an integer number (13995875117700).

Almost surely, 2^{210202211112121} is an apocalyptic number.

It is an amenable number.

210202211112121 is a deficient number, since it is larger than the sum of its proper divisors (13731790771079).

210202211112121 is a wasteful number, since it uses less digits than its factorization.

210202211112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587768.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 210202211112121 its reverse (121211112202012), we get a palindrome (331413323314133).

The spelling of 210202211112121 in words is "two hundred ten trillion, two hundred two billion, two hundred eleven million, one hundred twelve thousand, one hundred twenty-one".