1020120102 has 16 divisors (see below), whose sum is σ = 2266933680. Its totient is φ = 340040016.

The previous prime is 1020120083. The next prime is 1020120103. The reversal of 1020120102 is 2010210201.

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 (1020120103) 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, 9445503 + ... + 9445610.

It is an arithmetic number, because the mean of its divisors is an integer number (141683355).

Almost surely, 2^1020120102 is an apocalyptic number.

1020120102 is an abundant number, since it is smaller than the sum of its proper divisors (1246813578).

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

1020120102 is a wasteful number, since it uses less digits than its factorization.

1020120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18891124 (or 18891118 counting only the distinct ones).

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

The square root of 1020120102 is about 31939.3190597420. The cubic root of 1020120102 is about 1006.6622169640.

Adding to 1020120102 its reverse (2010210201), we get a palindrome (3030330303).

Subtracting 1020120102 from its reverse (2010210201), we obtain a palindrome (990090099).

It can be divided in two parts, 10201 and 20102, that multiplied together give a palindrome (205060502).

The spelling of 1020120102 in words is "one billion, twenty million, one hundred twenty thousand, one hundred two".