31033130330021 has 8 divisors (see below), whose sum is σ = 31098163749120. Its totient is φ = 30968133731872.

The previous prime is 31033130330009. The next prime is 31033130330023. The reversal of 31033130330021 is 12003303133013.

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 31033130330021 - 2¹⁰ = 31033130328997 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 (31033130330023) 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, 7517525 + ... + 10889418.

It is an arithmetic number, because the mean of its divisors is an integer number (3887270468640).

Almost surely, 2^{31033130330021} is an apocalyptic number.

It is an amenable number.

31033130330021 is a deficient number, since it is larger than the sum of its proper divisors (65033419099).

31033130330021 is a wasteful number, since it uses less digits than its factorization.

31033130330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18410475.

The product of its (nonzero) digits is 1458, while the sum is 23.

Adding to 31033130330021 its reverse (12003303133013), we get a palindrome (43036433463034).

The spelling of 31033130330021 in words is "thirty-one trillion, thirty-three billion, one hundred thirty million, three hundred thirty thousand, twenty-one".