120121002222021 has 8 divisors (see below), whose sum is σ = 177957040328960. Its totient is φ = 80080668147996.

The previous prime is 120121002222019. The next prime is 120121002222047. The reversal of 120121002222021 is 120222200121021.

It is a happy number.

120121002222021 is a `hidden beast` number, since 120 + 121 + 0 + 0 + 222 + 202 + 1 = 666.

It is not a de Polignac number, because 120121002222021 - 2¹ = 120121002222019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120121002221985 and 120121002222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121002222061) 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, 2224463004085 + ... + 2224463004138.

It is an arithmetic number, because the mean of its divisors is an integer number (22244630041120).

Almost surely, 2^{120121002222021} is an apocalyptic number.

It is an amenable number.

120121002222021 is a deficient number, since it is larger than the sum of its proper divisors (57836038106939).

120121002222021 is an equidigital number, since it uses as much as digits as its factorization.

120121002222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4448926008232 (or 4448926008226 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 120121002222021 its reverse (120222200121021), we get a palindrome (240343202343042).

The spelling of 120121002222021 in words is "one hundred twenty trillion, one hundred twenty-one billion, two million, two hundred twenty-two thousand, twenty-one".