31140121501 has 8 divisors (see below), whose sum is σ = 32974384824. Its totient is φ = 29306135040.

The previous prime is 31140121499. The next prime is 31140121549. The reversal of 31140121501 is 10512104113.

It can be written as a sum of positive squares in 4 ways, for example, as 6025795876 + 25114325625 = 77626^2 + 158475^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31140121501 - 2¹ = 31140121499 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 (31140121591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190161 + ... + 313753.

It is an arithmetic number, because the mean of its divisors is an integer number (4121798103).

Almost surely, 2^31140121501 is an apocalyptic number.

It is an amenable number.

31140121501 is a deficient number, since it is larger than the sum of its proper divisors (1834263323).

31140121501 is a wasteful number, since it uses less digits than its factorization.

31140121501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138431.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 31140121501 its reverse (10512104113), we get a palindrome (41652225614).

The spelling of 31140121501 in words is "thirty-one billion, one hundred forty million, one hundred twenty-one thousand, five hundred one".