31021212134 has 24 divisors (see below), whose sum is σ = 52336016040. Its totient is φ = 13772626560.

The previous prime is 31021212133. The next prime is 31021212203. The reversal of 31021212134 is 43121212013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021212133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1480139 + ... + 1500950.

It is an arithmetic number, because the mean of its divisors is an integer number (2180667335).

Almost surely, 2^31021212134 is an apocalyptic number.

31021212134 is a deficient number, since it is larger than the sum of its proper divisors (21314803906).

31021212134 is a wasteful number, since it uses less digits than its factorization.

31021212134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2981156 (or 2981145 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31021212134 its reverse (43121212013), we get a palindrome (74142424147).

The spelling of 31021212134 in words is "thirty-one billion, twenty-one million, two hundred twelve thousand, one hundred thirty-four".