120102111221 has 2 divisors, whose sum is σ = 120102111222. Its totient is φ = 120102111220.

The previous prime is 120102111197. The next prime is 120102111247. The reversal of 120102111221 is 122111201021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118783622500 + 1318488721 = 344650^2 + 36311^2 .

It is a cyclic number.

It is not a de Polignac number, because 120102111221 - 2¹⁰ = 120102110197 is a prime.

It is a super-2 number, since 2×120102111221² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 120102111196 and 120102111205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120102111251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60051055610 + 60051055611.

It is an arithmetic number, because the mean of its divisors is an integer number (60051055611).

Almost surely, 2^120102111221 is an apocalyptic number.

It is an amenable number.

120102111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

120102111221 is an equidigital number, since it uses as much as digits as its factorization.

120102111221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 120102111221 its reverse (122111201021), we get a palindrome (242213312242).

The spelling of 120102111221 in words is "one hundred twenty billion, one hundred two million, one hundred eleven thousand, two hundred twenty-one".