31021212130223 has 8 divisors (see below), whose sum is σ = 35587615438848. Its totient is φ = 26488509215544.

The previous prime is 31021212130219. The next prime is 31021212130231. The reversal of 31021212130223 is 32203121212013.

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 31021212130223 - 2² = 31021212130219 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 (31021212130273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8425096511 + ... + 8425100192.

It is an arithmetic number, because the mean of its divisors is an integer number (4448451929856).

Almost surely, 2^{31021212130223} is an apocalyptic number.

31021212130223 is a deficient number, since it is larger than the sum of its proper divisors (4566403308625).

31021212130223 is a wasteful number, since it uses less digits than its factorization.

31021212130223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16850196973.

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

Adding to 31021212130223 its reverse (32203121212013), we get a palindrome (63224333342236).

The spelling of 31021212130223 in words is "thirty-one trillion, twenty-one billion, two hundred twelve million, one hundred thirty thousand, two hundred twenty-three".