20123023212021 has 16 divisors (see below), whose sum is σ = 27402672787200. Its totient is φ = 13129384332288.

The previous prime is 20123023212007. The next prime is 20123023212049. The reversal of 20123023212021 is 12021232032102.

It is not a de Polignac number, because 20123023212021 - 2⁵ = 20123023211989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123023212001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621765 + ... + 6374373.

It is an arithmetic number, because the mean of its divisors is an integer number (1712667049200).

Almost surely, 2^{20123023212021} is an apocalyptic number.

It is an amenable number.

20123023212021 is a deficient number, since it is larger than the sum of its proper divisors (7279649575179).

20123023212021 is a wasteful number, since it uses less digits than its factorization.

20123023212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5777468.

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

Adding to 20123023212021 its reverse (12021232032102), we get a palindrome (32144255244123).

The spelling of 20123023212021 in words is "twenty trillion, one hundred twenty-three billion, twenty-three million, two hundred twelve thousand, twenty-one".