1020021102 has 12 divisors (see below), whose sum is σ = 2210045760. Its totient is φ = 340007028.

The previous prime is 1020020983. The next prime is 1020021127. The reversal of 1020021102 is 2011200201.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28333902 + ... + 28333937.

It is an arithmetic number, because the mean of its divisors is an integer number (184170480).

Almost surely, 2^1020021102 is an apocalyptic number.

1020021102 is an abundant number, since it is smaller than the sum of its proper divisors (1190024658).

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

1020021102 is a wasteful number, since it uses less digits than its factorization.

1020021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56667847 (or 56667844 counting only the distinct ones).

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

The square root of 1020021102 is about 31937.7692082587. The cubic root of 1020021102 is about 1006.6296512614.

Adding to 1020021102 its reverse (2011200201), we get a palindrome (3031221303).

The spelling of 1020021102 in words is "one billion, twenty million, twenty-one thousand, one hundred two".