31220911212623 has 32 divisors (see below), whose sum is σ = 34424169841152. Its totient is φ = 28079053516800.

The previous prime is 31220911212613. The next prime is 31220911212637. The reversal of 31220911212623 is 32621211902213.

It is not a de Polignac number, because 31220911212623 - 2⁴ = 31220911212607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220911212613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9395397440 + ... + 9395400762.

It is an arithmetic number, because the mean of its divisors is an integer number (1075755307536).

Almost surely, 2^{31220911212623} is an apocalyptic number.

31220911212623 is a deficient number, since it is larger than the sum of its proper divisors (3203258628529).

31220911212623 is a wasteful number, since it uses less digits than its factorization.

31220911212623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9215.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 31220911212623 in words is "thirty-one trillion, two hundred twenty billion, nine hundred eleven million, two hundred twelve thousand, six hundred twenty-three".