120102121211221 has 4 divisors (see below), whose sum is σ = 120419013352000. Its totient is φ = 119785229070444.

The previous prime is 120102121211173. The next prime is 120102121211239. The reversal of 120102121211221 is 122112121201021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120102121211221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120102121211321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158446069821 + ... + 158446070578.

It is an arithmetic number, because the mean of its divisors is an integer number (30104753338000).

Almost surely, 2^{120102121211221} is an apocalyptic number.

It is an amenable number.

120102121211221 is a deficient number, since it is larger than the sum of its proper divisors (316892140779).

120102121211221 is an equidigital number, since it uses as much as digits as its factorization.

120102121211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316892140778.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 120102121211221 its reverse (122112121201021), we get a palindrome (242214242412242).

The spelling of 120102121211221 in words is "one hundred twenty trillion, one hundred two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twenty-one".