20211110010121 has 4 divisors (see below), whose sum is σ = 20211679260432. Its totient is φ = 20210540759812.

The previous prime is 20211110010089. The next prime is 20211110010131. The reversal of 20211110010121 is 12101001111202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20211110010121 - 2⁵ = 20211110010089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211110010131) 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, 284571895 + ... + 284642908.

It is an arithmetic number, because the mean of its divisors is an integer number (5052919815108).

Almost surely, 2^{20211110010121} is an apocalyptic number.

It is an amenable number.

20211110010121 is a deficient number, since it is larger than the sum of its proper divisors (569250311).

20211110010121 is an equidigital number, since it uses as much as digits as its factorization.

20211110010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569250310.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20211110010121 its reverse (12101001111202), we get a palindrome (32312111121323).

The spelling of 20211110010121 in words is "twenty trillion, two hundred eleven billion, one hundred ten million, ten thousand, one hundred twenty-one".