120102220220021 has 8 divisors (see below), whose sum is σ = 129345201868344. Its totient is φ = 110859859903680.

The previous prime is 120102220219981. The next prime is 120102220220039. The reversal of 120102220220021 is 120022022201021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30258646617796 + 89843573602225 = 5500786^2 + 9478585^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120102220220021 - 2¹⁰ = 120102220218997 is a prime.

It is a super-2 number, since 2×120102220220021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120102220220221) 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, 154931486 + ... + 155704751.

It is an arithmetic number, because the mean of its divisors is an integer number (16168150233543).

Almost surely, 2^{120102220220021} is an apocalyptic number.

It is an amenable number.

120102220220021 is a deficient number, since it is larger than the sum of its proper divisors (9242981648323).

120102220220021 is a wasteful number, since it uses less digits than its factorization.

120102220220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310665991.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 120102220220021 its reverse (120022022201021), we get a palindrome (240124242421042).

The spelling of 120102220220021 in words is "one hundred twenty trillion, one hundred two billion, two hundred twenty million, two hundred twenty thousand, twenty-one".