31102420420240 has 160 divisors (see below), whose sum is σ = 78989180368896. Its totient is φ = 11319835484160.

The previous prime is 31102420420237. The next prime is 31102420420243. The reversal of 31102420420240 is 4202402420113.

It is an interprime number because it is at equal distance from previous prime (31102420420237) and next prime (31102420420243).

It is not an unprimeable number, because it can be changed into a prime (31102420420243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370856392 + ... + 370940248.

Almost surely, 2^{31102420420240} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31102420420240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39494590184448).

31102420420240 is an abundant number, since it is smaller than the sum of its proper divisors (47886759948656).

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

31102420420240 is a wasteful number, since it uses less digits than its factorization.

31102420420240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88977 (or 88971 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 31102420420240 its reverse (4202402420113), we get a palindrome (35304822840353).

The spelling of 31102420420240 in words is "thirty-one trillion, one hundred two billion, four hundred twenty million, four hundred twenty thousand, two hundred forty".