31144121443420 has 48 divisors (see below), whose sum is σ = 67537773692928. Its totient is φ = 12051261161280.

The previous prime is 31144121443417. The next prime is 31144121443439. The reversal of 31144121443420 is 2434412144113.

It is a super-2 number, since 2×31144121443420² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7780494 + ... + 11082613.

It is an arithmetic number, because the mean of its divisors is an integer number (1407036951936).

Almost surely, 2^{31144121443420} is an apocalyptic number.

It is an amenable number.

31144121443420 is an abundant number, since it is smaller than the sum of its proper divisors (36393652249508).

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

31144121443420 is a wasteful number, since it uses less digits than its factorization.

31144121443420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18865810 (or 18865808 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

Adding to 31144121443420 its reverse (2434412144113), we get a palindrome (33578533587533).

The spelling of 31144121443420 in words is "thirty-one trillion, one hundred forty-four billion, one hundred twenty-one million, four hundred forty-three thousand, four hundred twenty".