31212645211 has 8 divisors (see below), whose sum is σ = 34058716848. Its totient is φ = 28368000000.

The previous prime is 31212645179. The next prime is 31212645229. The reversal of 31212645211 is 11254621213.

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

It is a cyclic number.

It is not a de Polignac number, because 31212645211 - 2⁵ = 31212645179 is a prime.

It is a super-2 number, since 2×31212645211² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31212645211.

It is not an unprimeable number, because it can be changed into a prime (31212645251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310590 + ... + 398611.

It is an arithmetic number, because the mean of its divisors is an integer number (4257339606).

Almost surely, 2^31212645211 is an apocalyptic number.

31212645211 is a deficient number, since it is larger than the sum of its proper divisors (2846071637).

31212645211 is a wasteful number, since it uses less digits than its factorization.

31212645211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713213.

The product of its digits is 2880, while the sum is 28.

The spelling of 31212645211 in words is "thirty-one billion, two hundred twelve million, six hundred forty-five thousand, two hundred eleven".