21230020323131 has 8 divisors (see below), whose sum is σ = 21382799239200. Its totient is φ = 21077463633408.

The previous prime is 21230020323107. The next prime is 21230020323221. The reversal of 21230020323131 is 13132302003212.

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 21230020323131 - 2⁶ = 21230020323067 is a prime.

It is a super-2 number, since 2×21230020323131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21230020323097 and 21230020323106.

It is not an unprimeable number, because it can be changed into a prime (21230020323731) 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, 55364831 + ... + 55746968.

It is an arithmetic number, because the mean of its divisors is an integer number (2672849904900).

Almost surely, 2^{21230020323131} is an apocalyptic number.

21230020323131 is a deficient number, since it is larger than the sum of its proper divisors (152778916069).

21230020323131 is a wasteful number, since it uses less digits than its factorization.

21230020323131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111113173.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21230020323131 its reverse (13132302003212), we get a palindrome (34362322326343).

The spelling of 21230020323131 in words is "twenty-one trillion, two hundred thirty billion, twenty million, three hundred twenty-three thousand, one hundred thirty-one".