31020123022231 has 4 divisors (see below), whose sum is σ = 35451569168272. Its totient is φ = 26588676876192.

The previous prime is 31020123022169. The next prime is 31020123022237. The reversal of 31020123022231 is 13222032102013.

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 31020123022231 - 2¹⁹ = 31020122497943 is a prime.

It is a super-2 number, since 2×31020123022231² (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 (31020123022237) 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, 2215723073010 + ... + 2215723073023.

It is an arithmetic number, because the mean of its divisors is an integer number (8862892292068).

Almost surely, 2^{31020123022231} is an apocalyptic number.

31020123022231 is a deficient number, since it is larger than the sum of its proper divisors (4431446146041).

31020123022231 is an equidigital number, since it uses as much as digits as its factorization.

31020123022231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431446146040.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31020123022231 its reverse (13222032102013), we get a palindrome (44242155124244).

The spelling of 31020123022231 in words is "thirty-one trillion, twenty billion, one hundred twenty-three million, twenty-two thousand, two hundred thirty-one".