31102120141 has 4 divisors (see below), whose sum is σ = 31216888384. Its totient is φ = 30987351900.

The previous prime is 31102120123. The next prime is 31102120151. The reversal of 31102120141 is 14102120113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31102120141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31102120111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57383715 + ... + 57384256.

It is an arithmetic number, because the mean of its divisors is an integer number (7804222096).

Almost surely, 2^31102120141 is an apocalyptic number.

It is an amenable number.

31102120141 is a deficient number, since it is larger than the sum of its proper divisors (114768243).

31102120141 is a wasteful number, since it uses less digits than its factorization.

31102120141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114768242.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31102120141 its reverse (14102120113), we get a palindrome (45204240254).

The spelling of 31102120141 in words is "thirty-one billion, one hundred two million, one hundred twenty thousand, one hundred forty-one".