31102421203211 has 12 divisors (see below), whose sum is σ = 32330533573296. Its totient is φ = 29918882903760.

The previous prime is 31102421203159. The next prime is 31102421203237. The reversal of 31102421203211 is 11230212420113.

It is a de Polignac number, because none of the positive numbers 2^k-31102421203211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31102421203261) 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, 96739640 + ... + 97060613.

It is an arithmetic number, because the mean of its divisors is an integer number (2694211131108).

Almost surely, 2^{31102421203211} is an apocalyptic number.

31102421203211 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31102421203211 is a deficient number, since it is larger than the sum of its proper divisors (1228112370085).

31102421203211 is a wasteful number, since it uses less digits than its factorization.

31102421203211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193800482 (or 193800451 counting only the distinct ones).

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

Adding to 31102421203211 its reverse (11230212420113), we get a palindrome (42332633623324).

The spelling of 31102421203211 in words is "thirty-one trillion, one hundred two billion, four hundred twenty-one million, two hundred three thousand, two hundred eleven".