120021111220121 has 4 divisors (see below), whose sum is σ = 120062684174592. Its totient is φ = 119979538265652.

The previous prime is 120021111220117. The next prime is 120021111220123. The reversal of 120021111220121 is 121022111120021.

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 120021111220121 - 2² = 120021111220117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120021111220121.

It is not an unprimeable number, because it can be changed into a prime (120021111220123) 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, 20786472905 + ... + 20786478678.

It is an arithmetic number, because the mean of its divisors is an integer number (30015671043648).

Almost surely, 2^{120021111220121} is an apocalyptic number.

It is an amenable number.

120021111220121 is a deficient number, since it is larger than the sum of its proper divisors (41572954471).

120021111220121 is an equidigital number, since it uses as much as digits as its factorization.

120021111220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41572954470.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 120021111220121 its reverse (121022111120021), we get a palindrome (241043222340142).

The spelling of 120021111220121 in words is "one hundred twenty trillion, twenty-one billion, one hundred eleven million, two hundred twenty thousand, one hundred twenty-one".