120021102 has 56 divisors (see below), whose sum is σ = 271815984. Its totient is φ = 39727584.

The previous prime is 120021101. The next prime is 120021137. The reversal of 120021102 is 201120021.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021101) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 383298 + ... + 383610.

Almost surely, 2^120021102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 120021102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135907992).

120021102 is an abundant number, since it is smaller than the sum of its proper divisors (151794882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120021102 is an equidigital number, since it uses as much as digits as its factorization.

120021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 120021102 is about 10955.4142778811. The cubic root of 120021102 is about 493.2713253977.

Adding to 120021102 its reverse (201120021), we get a palindrome (321141123).

The spelling of 120021102 in words is "one hundred twenty million, twenty-one thousand, one hundred two".