21110010201121 has 4 divisors (see below), whose sum is σ = 21110052600000. Its totient is φ = 21109967802244.

The previous prime is 21110010201113. The next prime is 21110010201143. The reversal of 21110010201121 is 12110201001112.

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 21110010201121 - 2³ = 21110010201113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110010201191) 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, 20443621 + ... + 21451378.

It is an arithmetic number, because the mean of its divisors is an integer number (5277513150000).

Almost surely, 2^{21110010201121} is an apocalyptic number.

It is an amenable number.

21110010201121 is a deficient number, since it is larger than the sum of its proper divisors (42398879).

21110010201121 is an equidigital number, since it uses as much as digits as its factorization.

21110010201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42398878.

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

Adding to 21110010201121 its reverse (12110201001112), we get a palindrome (33220211202233).

The spelling of 21110010201121 in words is "twenty-one trillion, one hundred ten billion, ten million, two hundred one thousand, one hundred twenty-one".