31102020131424 has 192 divisors, whose sum is σ = 91246096311552. Its totient is φ = 9194082508800.

The previous prime is 31102020131353. The next prime is 31102020131437. The reversal of 31102020131424 is 42413102020113.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 31102020131394 and 31102020131403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 539309439 + ... + 539367105.

It is an arithmetic number, because the mean of its divisors is an integer number (475240084956).

Almost surely, 2^{31102020131424} 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 31102020131424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45623048155776).

31102020131424 is an abundant number, since it is smaller than the sum of its proper divisors (60144076180128).

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

31102020131424 is a wasteful number, since it uses less digits than its factorization.

31102020131424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70189 (or 70181 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 31102020131424 its reverse (42413102020113), we get a palindrome (73515122151537).

The spelling of 31102020131424 in words is "thirty-one trillion, one hundred two billion, twenty million, one hundred thirty-one thousand, four hundred twenty-four".