21002321221131 has 8 divisors (see below), whose sum is σ = 28003215138624. Its totient is φ = 14001487392200.

The previous prime is 21002321221111. The next prime is 21002321221159. The reversal of 21002321221131 is 13112212320012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002321221131 is a prime.

It is a super-2 number, since 2×21002321221131² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21002321221098 and 21002321221107.

It is not an unprimeable number, because it can be changed into a prime (21002321221111) 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, 14200161 + ... + 15609266.

It is an arithmetic number, because the mean of its divisors is an integer number (3500401892328).

Almost surely, 2^{21002321221131} is an apocalyptic number.

21002321221131 is a deficient number, since it is larger than the sum of its proper divisors (7000893917493).

21002321221131 is a wasteful number, since it uses less digits than its factorization.

21002321221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30044281.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21002321221131 its reverse (13112212320012), we get a palindrome (34114533541143).

The spelling of 21002321221131 in words is "twenty-one trillion, two billion, three hundred twenty-one million, two hundred twenty-one thousand, one hundred thirty-one".