21231010013011 has 8 divisors (see below), whose sum is σ = 21234491937680. Its totient is φ = 21227528310912.

The previous prime is 21231010012999. The next prime is 21231010013023. The reversal of 21231010013011 is 11031001013212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21231010012999) and next prime (21231010013023).

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 21231010013011 - 2²⁵ = 21230976458579 is a prime.

It is a super-2 number, since 2×21231010013011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21231010013611) 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, 386138320 + ... + 386193298.

It is an arithmetic number, because the mean of its divisors is an integer number (2654311492210).

Almost surely, 2^{21231010013011} is an apocalyptic number.

21231010013011 is a deficient number, since it is larger than the sum of its proper divisors (3481924669).

21231010013011 is an equidigital number, since it uses as much as digits as its factorization.

21231010013011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111285.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21231010013011 its reverse (11031001013212), we get a palindrome (32262011026223).

The spelling of 21231010013011 in words is "twenty-one trillion, two hundred thirty-one billion, ten million, thirteen thousand, eleven".