31190134921 has 8 divisors (see below), whose sum is σ = 34043467104. Its totient is φ = 28339780320.

The previous prime is 31190134919. The next prime is 31190134939. The reversal of 31190134921 is 12943109113.

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 31190134921 - 2¹ = 31190134919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31190134901) 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, 722460 + ... + 764413.

It is an arithmetic number, because the mean of its divisors is an integer number (4255433388).

Almost surely, 2^31190134921 is an apocalyptic number.

It is an amenable number.

31190134921 is a deficient number, since it is larger than the sum of its proper divisors (2853332183).

31190134921 is a wasteful number, since it uses less digits than its factorization.

31190134921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488791.

The product of its (nonzero) digits is 5832, while the sum is 34.

The spelling of 31190134921 in words is "thirty-one billion, one hundred ninety million, one hundred thirty-four thousand, nine hundred twenty-one".