120100220200021 has 32 divisors (see below), whose sum is σ = 129670016256000. Its totient is φ = 111026982673152.

The previous prime is 120100220200001. The next prime is 120100220200057. The reversal of 120100220200021 is 120002022001021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 120100220200021 - 2²¹ = 120100218102869 is a prime.

It is a super-3 number, since 3×120100220200021³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120100220199974 and 120100220200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120100220200001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6620395 + ... + 16853191.

It is an arithmetic number, because the mean of its divisors is an integer number (4052188008000).

Almost surely, 2^{120100220200021} is an apocalyptic number.

It is an amenable number.

120100220200021 is a deficient number, since it is larger than the sum of its proper divisors (9569796055979).

120100220200021 is a wasteful number, since it uses less digits than its factorization.

120100220200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10233061.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 120100220200021 its reverse (120002022001021), we get a palindrome (240102242201042).

The spelling of 120100220200021 in words is "one hundred twenty trillion, one hundred billion, two hundred twenty million, two hundred thousand, twenty-one".