120002222021 has 6 divisors (see below), whose sum is σ = 131903268966. Its totient is φ = 109092929000.

The previous prime is 120002221979. The next prime is 120002222023. The reversal of 120002222021 is 120222200021.

It can be written as a sum of positive squares in only one way, i.e., 106380997921 + 13621224100 = 326161^2 + 116710^2 .

It is not a de Polignac number, because 120002222021 - 2¹⁴ = 120002205637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120002221987 and 120002222005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120002222023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 495876830 + ... + 495877071.

It is an arithmetic number, because the mean of its divisors is an integer number (21983878161).

Almost surely, 2^120002222021 is an apocalyptic number.

120002222021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120002222021 is a deficient number, since it is larger than the sum of its proper divisors (11901046945).

120002222021 is an equidigital number, since it uses as much as digits as its factorization.

120002222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991753923 (or 991753912 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 120002222021 its reverse (120222200021), we get a palindrome (240224422042).

The spelling of 120002222021 in words is "one hundred twenty billion, two million, two hundred twenty-two thousand, twenty-one".