200121010111023 has 16 divisors (see below), whose sum is σ = 279810198369120. Its totient is φ = 127048954927104.

The previous prime is 200121010111021. The next prime is 200121010111031. The reversal of 200121010111023 is 320111010121002.

It is not a de Polignac number, because 200121010111023 - 2¹ = 200121010111021 is a prime.

It is a super-2 number, since 2×200121010111023² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 200121010110993 and 200121010111011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121010111021) 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, 15755072386 + ... + 15755085087.

It is an arithmetic number, because the mean of its divisors is an integer number (17488137398070).

Almost surely, 2^{200121010111023} is an apocalyptic number.

200121010111023 is a deficient number, since it is larger than the sum of its proper divisors (79689188258097).

200121010111023 is a wasteful number, since it uses less digits than its factorization.

200121010111023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31510157578.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 200121010111023 its reverse (320111010121002), we get a palindrome (520232020232025).

The spelling of 200121010111023 in words is "two hundred trillion, one hundred twenty-one billion, ten million, one hundred eleven thousand, twenty-three".