20002021121023 has 4 divisors (see below), whose sum is σ = 20002075217008. Its totient is φ = 20001967025040.

The previous prime is 20002021121009. The next prime is 20002021121057. The reversal of 20002021121023 is 32012112020002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20002021121023 - 2²⁵ = 20001987566591 is a prime.

It is a super-2 number, since 2×20002021121023² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002021120988 and 20002021121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002027121023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26489523 + ... + 27234148.

It is an arithmetic number, because the mean of its divisors is an integer number (5000518804252).

Almost surely, 2^{20002021121023} is an apocalyptic number.

20002021121023 is a deficient number, since it is larger than the sum of its proper divisors (54095985).

20002021121023 is an equidigital number, since it uses as much as digits as its factorization.

20002021121023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54095984.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20002021121023 its reverse (32012112020002), we get a palindrome (52014133141025).

The spelling of 20002021121023 in words is "twenty trillion, two billion, twenty-one million, one hundred twenty-one thousand, twenty-three".