231221311133010 has 64 divisors (see below), whose sum is σ = 605955436959744. Its totient is φ = 56000317464000.

The previous prime is 231221311132937. The next prime is 231221311133093. The reversal of 231221311133010 is 10331113122132.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 332988394 + ... + 333682053.

It is an arithmetic number, because the mean of its divisors is an integer number (9468053702496).

Almost surely, 2^{231221311133010} is an apocalyptic number.

231221311133010 is an abundant number, since it is smaller than the sum of its proper divisors (374734125826734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231221311133010 is a wasteful number, since it uses less digits than its factorization.

231221311133010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666671519.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 231221311133010 its reverse (10331113122132), we get a palindrome (241552424255142).

The spelling of 231221311133010 in words is "two hundred thirty-one trillion, two hundred twenty-one billion, three hundred eleven million, one hundred thirty-three thousand, ten".