1002021102 has 24 divisors (see below), whose sum is σ = 2180535240. Its totient is φ = 332547120.

The previous prime is 1002021073. The next prime is 1002021109. The reversal of 1002021102 is 2011202001.

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 (1002021109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117424 + ... + 125667.

It is an arithmetic number, because the mean of its divisors is an integer number (90855635).

Almost surely, 2^1002021102 is an apocalyptic number.

1002021102 is an abundant number, since it is smaller than the sum of its proper divisors (1178514138).

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

1002021102 is a wasteful number, since it uses less digits than its factorization.

1002021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243328 (or 243325 counting only the distinct ones).

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

The square root of 1002021102 is about 31654.7168996976. The cubic root of 1002021102 is about 1000.6732473030.

Adding to 1002021102 its reverse (2011202001), we get a palindrome (3013223103).

It can be divided in two parts, 100 and 2021102, that added together give a palindrome (2021202).

The spelling of 1002021102 in words is "one billion, two million, twenty-one thousand, one hundred two".