21230022234621 has 16 divisors (see below), whose sum is σ = 28855583078400. Its totient is φ = 13879178813760.

The previous prime is 21230022234587. The next prime is 21230022234649. The reversal of 21230022234621 is 12643222003212.

It is not a de Polignac number, because 21230022234621 - 2⁷ = 21230022234493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230022234521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33944125 + ... + 34563906.

It is an arithmetic number, because the mean of its divisors is an integer number (1803473942400).

Almost surely, 2^{21230022234621} is an apocalyptic number.

It is an amenable number.

21230022234621 is a deficient number, since it is larger than the sum of its proper divisors (7625560843779).

21230022234621 is a wasteful number, since it uses less digits than its factorization.

21230022234621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68510036.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 21230022234621 its reverse (12643222003212), we get a palindrome (33873244237833).

The spelling of 21230022234621 in words is "twenty-one trillion, two hundred thirty billion, twenty-two million, two hundred thirty-four thousand, six hundred twenty-one".