20121323022021 has 16 divisors (see below), whose sum is σ = 30412795931840. Its totient is φ = 11730649858560.

The previous prime is 20121323021981. The next prime is 20121323022043. The reversal of 20121323022021 is 12022032312102.

It is not a de Polignac number, because 20121323022021 - 2⁹ = 20121323021509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121323020021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13577140300 + ... + 13577141781.

It is an arithmetic number, because the mean of its divisors is an integer number (1900799745740).

Almost surely, 2^{20121323022021} is an apocalyptic number.

It is an amenable number.

20121323022021 is a deficient number, since it is larger than the sum of its proper divisors (10291472909819).

20121323022021 is a wasteful number, since it uses less digits than its factorization.

20121323022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27154282116.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20121323022021 its reverse (12022032312102), we get a palindrome (32143355334123).

The spelling of 20121323022021 in words is "twenty trillion, one hundred twenty-one billion, three hundred twenty-three million, twenty-two thousand, twenty-one".