2120202100121 has 4 divisors (see below), whose sum is σ = 2423088114432. Its totient is φ = 1817316085812.

The previous prime is 2120202100117. The next prime is 2120202100147. The reversal of 2120202100121 is 1210012020212.

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 2120202100121 - 2² = 2120202100117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120202100096 and 2120202100105.

It is not an unprimeable number, because it can be changed into a prime (2120202100111) 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, 151443007145 + ... + 151443007158.

It is an arithmetic number, because the mean of its divisors is an integer number (605772028608).

Almost surely, 2^{2120202100121} is an apocalyptic number.

It is an amenable number.

2120202100121 is a deficient number, since it is larger than the sum of its proper divisors (302886014311).

2120202100121 is an equidigital number, since it uses as much as digits as its factorization.

2120202100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302886014310.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2120202100121 its reverse (1210012020212), we get a palindrome (3330214120333).

The spelling of 2120202100121 in words is "two trillion, one hundred twenty billion, two hundred two million, one hundred thousand, one hundred twenty-one".