121200120212021 has 4 divisors (see below), whose sum is σ = 121202531581152. Its totient is φ = 121197708842892.

The previous prime is 121200120211967. The next prime is 121200120212033. The reversal of 121200120212021 is 120212021002121.

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 a de Polignac number, because none of the positive numbers 2^k-121200120212021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200120211021) 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, 1205609171 + ... + 1205709696.

It is an arithmetic number, because the mean of its divisors is an integer number (30300632895288).

Almost surely, 2^{121200120212021} is an apocalyptic number.

It is an amenable number.

121200120212021 is a deficient number, since it is larger than the sum of its proper divisors (2411369131).

121200120212021 is an equidigital number, since it uses as much as digits as its factorization.

121200120212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2411369130.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121200120212021 its reverse (120212021002121), we get a palindrome (241412141214142).

The spelling of 121200120212021 in words is "one hundred twenty-one trillion, two hundred billion, one hundred twenty million, two hundred twelve thousand, twenty-one".