120202022221 has 4 divisors (see below), whose sum is σ = 120896831772. Its totient is φ = 119507212672.

The previous prime is 120202022219. The next prime is 120202022231. The reversal of 120202022221 is 122220202021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122220202021 = 23 ⋅5313921827.

It can be written as a sum of positive squares in 2 ways, for example, as 43843753321 + 76358268900 = 209389^2 + 276330^2 .

It is a cyclic number.

It is not a de Polignac number, because 120202022221 - 2¹ = 120202022219 is a prime.

It is a super-2 number, since 2×120202022221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120202022195 and 120202022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120202022231) 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, 347404516 + ... + 347404861.

It is an arithmetic number, because the mean of its divisors is an integer number (30224207943).

Almost surely, 2^120202022221 is an apocalyptic number.

It is an amenable number.

120202022221 is a deficient number, since it is larger than the sum of its proper divisors (694809551).

120202022221 is an equidigital number, since it uses as much as digits as its factorization.

120202022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694809550.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 120202022221 its reverse (122220202021), we get a palindrome (242422224242).

The spelling of 120202022221 in words is "one hundred twenty billion, two hundred two million, twenty-two thousand, two hundred twenty-one".