31401121140 has 72 divisors (see below), whose sum is σ = 95269705440. Its totient is φ = 8371905984.

The previous prime is 31401121127. The next prime is 31401121159. The reversal of 31401121140 is 4112110413.

31401121140 is a `hidden beast` number, since 3 + 1 + 401 + 121 + 140 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1025127 + ... + 1055313.

Almost surely, 2^31401121140 is an apocalyptic number.

31401121140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31401121140 is an abundant number, since it is smaller than the sum of its proper divisors (63868584300).

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

31401121140 is a wasteful number, since it uses less digits than its factorization.

31401121140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35981 (or 35976 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 31401121140 its reverse (4112110413), we get a palindrome (35513231553).

The spelling of 31401121140 in words is "thirty-one billion, four hundred one million, one hundred twenty-one thousand, one hundred forty".