210243421131121 has 32 divisors (see below), whose sum is σ = 240881128915968. Its totient is φ = 179757107312640.

The previous prime is 210243421131097. The next prime is 210243421131131. The reversal of 210243421131121 is 121131124342012.

It is a cyclic number.

It is not a de Polignac number, because 210243421131121 - 2⁵ = 210243421131089 is a prime.

It is a super-2 number, since 2×210243421131121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210243421131121.

It is not an unprimeable number, because it can be changed into a prime (210243421131131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22222109331 + ... + 22222118791.

It is an arithmetic number, because the mean of its divisors is an integer number (7527535278624).

Almost surely, 2^{210243421131121} is an apocalyptic number.

It is an amenable number.

210243421131121 is a deficient number, since it is larger than the sum of its proper divisors (30637707784847).

210243421131121 is a wasteful number, since it uses less digits than its factorization.

210243421131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14481.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 210243421131121 its reverse (121131124342012), we get a palindrome (331374545473133).

The spelling of 210243421131121 in words is "two hundred ten trillion, two hundred forty-three billion, four hundred twenty-one million, one hundred thirty-one thousand, one hundred twenty-one".