31101420111140 has 48 divisors (see below), whose sum is σ = 67155810266160. Its totient is φ = 12093860113920.

The previous prime is 31101420111103. The next prime is 31101420111149. The reversal of 31101420111140 is 4111102410113.

It can be written as a sum of positive squares in 8 ways, for example, as 351822177316 + 30749597933824 = 593146^2 + 5545232^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (31101420111149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134476031 + ... + 134707110.

It is an arithmetic number, because the mean of its divisors is an integer number (1399079380545).

Almost surely, 2^{31101420111140} is an apocalyptic number.

It is an amenable number.

31101420111140 is an abundant number, since it is smaller than the sum of its proper divisors (36054390155020).

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

31101420111140 is a wasteful number, since it uses less digits than its factorization.

31101420111140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269183312 (or 269183310 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 31101420111140 its reverse (4111102410113), we get a palindrome (35212522521253).

The spelling of 31101420111140 in words is "thirty-one trillion, one hundred one billion, four hundred twenty million, one hundred eleven thousand, one hundred forty".