120121200210021 has 16 divisors (see below), whose sum is σ = 160488726339648. Its totient is φ = 79917396768000.

The previous prime is 120121200210013. The next prime is 120121200210029. The reversal of 120121200210021 is 120012002121021.

It is an interprime number because it is at equal distance from previous prime (120121200210013) and next prime (120121200210029).

It is not a de Polignac number, because 120121200210021 - 2³ = 120121200210013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121200210029) 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, 16946580 + ... + 22965821.

It is an arithmetic number, because the mean of its divisors is an integer number (10030545396228).

Almost surely, 2^{120121200210021} is an apocalyptic number.

It is an amenable number.

120121200210021 is a deficient number, since it is larger than the sum of its proper divisors (40367526129627).

120121200210021 is a wasteful number, since it uses less digits than its factorization.

120121200210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39914452.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 120121200210021 its reverse (120012002121021), we get a palindrome (240133202331042).

The spelling of 120121200210021 in words is "one hundred twenty trillion, one hundred twenty-one billion, two hundred million, two hundred ten thousand, twenty-one".