21121012120201 has 8 divisors (see below), whose sum is σ = 24138414489024. Its totient is φ = 18103638482160.

The previous prime is 21121012120163. The next prime is 21121012120213. The reversal of 21121012120201 is 10202121012112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21121012120201 - 2⁷ = 21121012120073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21121010120201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5583670 + ... + 8568511.

It is an arithmetic number, because the mean of its divisors is an integer number (3017301811128).

Almost surely, 2^{21121012120201} is an apocalyptic number.

It is an amenable number.

21121012120201 is a deficient number, since it is larger than the sum of its proper divisors (3017402368823).

21121012120201 is a wasteful number, since it uses less digits than its factorization.

21121012120201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14365391.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21121012120201 its reverse (10202121012112), we get a palindrome (31323133132313).

The spelling of 21121012120201 in words is "twenty-one trillion, one hundred twenty-one billion, twelve million, one hundred twenty thousand, two hundred one".