31221202434 has 32 divisors (see below), whose sum is σ = 64538581056. Its totient is φ = 10061288640.

The previous prime is 31221202433. The next prime is 31221202459. The reversal of 31221202434 is 43420212213.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31221202433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413032 + ... + 482739.

It is an arithmetic number, because the mean of its divisors is an integer number (2016830658).

Almost surely, 2^31221202434 is an apocalyptic number.

31221202434 is an abundant number, since it is smaller than the sum of its proper divisors (33317378622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31221202434 is a wasteful number, since it uses less digits than its factorization.

31221202434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895970.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 31221202434 its reverse (43420212213), we get a palindrome (74641414647).

The spelling of 31221202434 in words is "thirty-one billion, two hundred twenty-one million, two hundred two thousand, four hundred thirty-four".