2021220902 has 4 divisors (see below), whose sum is σ = 3031831356. Its totient is φ = 1010610450.

The previous prime is 2021220889. The next prime is 2021220907. The reversal of 2021220902 is 2090221202.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021220907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505305224 + ... + 505305227.

It is an arithmetic number, because the mean of its divisors is an integer number (757957839).

Almost surely, 2^2021220902 is an apocalyptic number.

2021220902 is a deficient number, since it is larger than the sum of its proper divisors (1010610454).

2021220902 is a wasteful number, since it uses less digits than its factorization.

2021220902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010610453.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2021220902 is about 44957.9904132736. The cubic root of 2021220902 is about 1264.3614918875.

It can be divided in two parts, 20212 and 20902, that added together give a palindrome (41114).

The spelling of 2021220902 in words is "two billion, twenty-one million, two hundred twenty thousand, nine hundred two".