21130210012331 has 16 divisors (see below), whose sum is σ = 24164652196608. Its totient is φ = 18099731944800.

The previous prime is 21130210012271. The next prime is 21130210012349. The reversal of 21130210012331 is 13321001203112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21130210012331 - 2¹⁰ = 21130210011307 is a prime.

It is a super-2 number, since 2×21130210012331² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21130210012631) 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, 65620301 + ... + 65941521.

It is an arithmetic number, because the mean of its divisors is an integer number (1510290762288).

Almost surely, 2^{21130210012331} is an apocalyptic number.

21130210012331 is a deficient number, since it is larger than the sum of its proper divisors (3034442184277).

21130210012331 is a wasteful number, since it uses less digits than its factorization.

21130210012331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327362.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21130210012331 its reverse (13321001203112), we get a palindrome (34451211215443).

The spelling of 21130210012331 in words is "twenty-one trillion, one hundred thirty billion, two hundred ten million, twelve thousand, three hundred thirty-one".