31201352522123 has 4 divisors (see below), whose sum is σ = 35658688596720. Its totient is φ = 26744016447528.

The previous prime is 31201352522099. The next prime is 31201352522167. The reversal of 31201352522123 is 32122525310213.

It is a happy number.

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 31201352522123 - 2²⁴ = 31201335744907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31201352522123.

It is not an unprimeable number, because it can be changed into a prime (31201352522323) 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, 2228668037288 + ... + 2228668037301.

It is an arithmetic number, because the mean of its divisors is an integer number (8914672149180).

Almost surely, 2^{31201352522123} is an apocalyptic number.

31201352522123 is a deficient number, since it is larger than the sum of its proper divisors (4457336074597).

31201352522123 is an equidigital number, since it uses as much as digits as its factorization.

31201352522123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4457336074596.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 31201352522123 its reverse (32122525310213), we get a palindrome (63323877832336).

The spelling of 31201352522123 in words is "thirty-one trillion, two hundred one billion, three hundred fifty-two million, five hundred twenty-two thousand, one hundred twenty-three".