31202130102 has 64 divisors (see below), whose sum is σ = 73378255104. Its totient is φ = 8720231040.

The previous prime is 31202130053. The next prime is 31202130103. The reversal of 31202130102 is 20103120213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31202130103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1003128 + ... + 1033764.

It is an arithmetic number, because the mean of its divisors is an integer number (1146535236).

Almost surely, 2^31202130102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31202130102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36689127552).

31202130102 is an abundant number, since it is smaller than the sum of its proper divisors (42176125002).

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

31202130102 is a wasteful number, since it uses less digits than its factorization.

31202130102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31853.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31202130102 its reverse (20103120213), we get a palindrome (51305250315).

The spelling of 31202130102 in words is "thirty-one billion, two hundred two million, one hundred thirty thousand, one hundred two".