231213121220210 has 8 divisors (see below), whose sum is σ = 416183618196396. Its totient is φ = 92485248488080.

The previous prime is 231213121220197. The next prime is 231213121220227. The reversal of 231213121220210 is 12022121312132.

It can be written as a sum of positive squares in 2 ways, for example, as 225175864351321 + 6037256868889 = 15005861^2 + 2457083^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11560656061001 + ... + 11560656061020.

Almost surely, 2^{231213121220210} is an apocalyptic number.

231213121220210 is a deficient number, since it is larger than the sum of its proper divisors (184970496976186).

231213121220210 is a wasteful number, since it uses less digits than its factorization.

231213121220210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23121312122028.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 231213121220210 its reverse (12022121312132), we get a palindrome (243235242532342).

The spelling of 231213121220210 in words is "two hundred thirty-one trillion, two hundred thirteen billion, one hundred twenty-one million, two hundred twenty thousand, two hundred ten".