31012201213223 has 4 divisors (see below), whose sum is σ = 31012252499328. Its totient is φ = 31012149927120.

The previous prime is 31012201213207. The next prime is 31012201213277. The reversal of 31012201213223 is 32231210221013.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31012201213223 - 2⁴ = 31012201213207 is a prime.

It is a super-2 number, since 2×31012201213223² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012201713223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24725063 + ... + 25949048.

It is an arithmetic number, because the mean of its divisors is an integer number (7753063124832).

Almost surely, 2^{31012201213223} is an apocalyptic number.

31012201213223 is a deficient number, since it is larger than the sum of its proper divisors (51286105).

31012201213223 is an equidigital number, since it uses as much as digits as its factorization.

31012201213223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51286104.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31012201213223 its reverse (32231210221013), we get a palindrome (63243411434236).

The spelling of 31012201213223 in words is "thirty-one trillion, twelve billion, two hundred one million, two hundred thirteen thousand, two hundred twenty-three".