231121021210 has 16 divisors (see below), whose sum is σ = 425692672416. Its totient is φ = 90298445328.

The previous prime is 231121021189. The next prime is 231121021231. The reversal of 231121021210 is 12120121132.

It is an interprime number because it is at equal distance from previous prime (231121021189) and next prime (231121021231).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268744944 + ... + 268745803.

It is an arithmetic number, because the mean of its divisors is an integer number (26605792026).

Almost surely, 2^231121021210 is an apocalyptic number.

231121021210 is a deficient number, since it is larger than the sum of its proper divisors (194571651206).

231121021210 is a wasteful number, since it uses less digits than its factorization.

231121021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537490797.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 231121021210 its reverse (12120121132), we get a palindrome (243241142342).

The spelling of 231121021210 in words is "two hundred thirty-one billion, one hundred twenty-one million, twenty-one thousand, two hundred ten".