210313121121 has 12 divisors (see below), whose sum is σ = 303804521748. Its totient is φ = 140200023264.

The previous prime is 210313121101. The next prime is 210313121147. The reversal of 210313121121 is 121121313012.

210313121121 is a `hidden beast` number, since 210 + 31 + 312 + 112 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 97793798400 + 112519322721 = 312720^2 + 335439^2 .

It is not a de Polignac number, because 210313121121 - 2¹⁴ = 210313104737 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 210313121094 and 210313121103.

It is not an unprimeable number, because it can be changed into a prime (210313121101) 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, 572610 + ... + 865163.

It is an arithmetic number, because the mean of its divisors is an integer number (25317043479).

Almost surely, 2^210313121121 is an apocalyptic number.

It is an amenable number.

210313121121 is a deficient number, since it is larger than the sum of its proper divisors (93491400627).

210313121121 is a wasteful number, since it uses less digits than its factorization.

210313121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454032 (or 1454029 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 210313121121 its reverse (121121313012), we get a palindrome (331434434133).

The spelling of 210313121121 in words is "two hundred ten billion, three hundred thirteen million, one hundred twenty-one thousand, one hundred twenty-one".