120021102202221 has 72 divisors (see below), whose sum is σ = 194610130513344. Its totient is φ = 70688053347840.

The previous prime is 120021102202181. The next prime is 120021102202237. The reversal of 120021102202221 is 122202201120021.

It is a happy number.

120021102202221 is a `hidden beast` number, since 1 + 200 + 21 + 1 + 0 + 220 + 2 + 221 = 666.

It is not a de Polignac number, because 120021102202221 - 2¹³ = 120021102194029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120021102202194 and 120021102202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021102202621) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 111004005 + ... + 112080021.

It is an arithmetic number, because the mean of its divisors is an integer number (2702918479352).

Almost surely, 2^{120021102202221} is an apocalyptic number.

120021102202221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120021102202221 is a deficient number, since it is larger than the sum of its proper divisors (74589028311123).

120021102202221 is a wasteful number, since it uses less digits than its factorization.

120021102202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076931 (or 1076891 counting only the distinct ones).

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

Adding to 120021102202221 its reverse (122202201120021), we get a palindrome (242223303322242).

The spelling of 120021102202221 in words is "one hundred twenty trillion, twenty-one billion, one hundred two million, two hundred two thousand, two hundred twenty-one".