20010121121023 has 16 divisors (see below), whose sum is σ = 22612512585600. Its totient is φ = 17539975565280.

The previous prime is 20010121120993. The next prime is 20010121121027. The reversal of 20010121121023 is 32012112101002.

It is a cyclic number.

It is not a de Polignac number, because 20010121121023 - 2⁵ = 20010121120991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010121120988 and 20010121121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010121121027) 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, 42205161 + ... + 42676642.

It is an arithmetic number, because the mean of its divisors is an integer number (1413282036600).

Almost surely, 2^{20010121121023} is an apocalyptic number.

20010121121023 is a deficient number, since it is larger than the sum of its proper divisors (2602391464577).

20010121121023 is a wasteful number, since it uses less digits than its factorization.

20010121121023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84882582.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20010121121023 its reverse (32012112101002), we get a palindrome (52022233222025).

The spelling of 20010121121023 in words is "twenty trillion, ten billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty-three".