121200120202021 has 8 divisors (see below), whose sum is σ = 146662330328640. Its totient is φ = 97774886885568.

The previous prime is 121200120202003. The next prime is 121200120202061. The reversal of 121200120202021 is 120202021002121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121200120202021 - 2⁵ = 121200120201989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121200120201986 and 121200120202004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200120202061) 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, 509244202411 + ... + 509244202648.

It is an arithmetic number, because the mean of its divisors is an integer number (18332791291080).

Almost surely, 2^{121200120202021} is an apocalyptic number.

It is an amenable number.

121200120202021 is a deficient number, since it is larger than the sum of its proper divisors (25462210126619).

121200120202021 is a wasteful number, since it uses less digits than its factorization.

121200120202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018488405083.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121200120202021 its reverse (120202021002121), we get a palindrome (241402141204142).

The spelling of 121200120202021 in words is "one hundred twenty-one trillion, two hundred billion, one hundred twenty million, two hundred two thousand, twenty-one".