120102212122221 has 32 divisors (see below), whose sum is σ = 187960149649408. Its totient is φ = 66774633837120.

The previous prime is 120102212122199. The next prime is 120102212122241. The reversal of 120102212122221 is 122221212201021.

It is not a de Polignac number, because 120102212122221 - 2⁹ = 120102212121709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120102212122241) 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, 277392576 + ... + 277825206.

It is an arithmetic number, because the mean of its divisors is an integer number (5873754676544).

Almost surely, 2^{120102212122221} is an apocalyptic number.

It is an amenable number.

120102212122221 is a deficient number, since it is larger than the sum of its proper divisors (67857937527187).

120102212122221 is a wasteful number, since it uses less digits than its factorization.

120102212122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789961.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 120102212122221 its reverse (122221212201021), we get a palindrome (242323424323242).

The spelling of 120102212122221 in words is "one hundred twenty trillion, one hundred two billion, two hundred twelve million, one hundred twenty-two thousand, two hundred twenty-one".