21003231022311 has 32 divisors (see below), whose sum is σ = 30522877152768. Its totient is φ = 12794943006720.

The previous prime is 21003231022307. The next prime is 21003231022327. The reversal of 21003231022311 is 11322013230012.

It is not a de Polignac number, because 21003231022311 - 2² = 21003231022307 is a prime.

It is a super-2 number, since 2×21003231022311² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003231022381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28308610 + ... + 29041071.

It is an arithmetic number, because the mean of its divisors is an integer number (953839911024).

Almost surely, 2^{21003231022311} is an apocalyptic number.

21003231022311 is a deficient number, since it is larger than the sum of its proper divisors (9519646130457).

21003231022311 is a wasteful number, since it uses less digits than its factorization.

21003231022311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57349911.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21003231022311 its reverse (11322013230012), we get a palindrome (32325244252323).

The spelling of 21003231022311 in words is "twenty-one trillion, three billion, two hundred thirty-one million, twenty-two thousand, three hundred eleven".