2102202021 has 8 divisors (see below), whose sum is σ = 2806395424. Its totient is φ = 1399738320.

The previous prime is 2102202007. The next prime is 2102202049. The reversal of 2102202021 is 1202022012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2102202021 - 2⁵ = 2102201989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102201988 and 2102202006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102202071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429586 + ... + 434451.

It is an arithmetic number, because the mean of its divisors is an integer number (350799428).

Almost surely, 2^2102202021 is an apocalyptic number.

It is an amenable number.

2102202021 is a deficient number, since it is larger than the sum of its proper divisors (704193403).

2102202021 is an equidigital number, since it uses as much as digits as its factorization.

2102202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864851.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2102202021 is about 45849.7766733929. The cubic root of 2102202021 is about 1281.0266058079.

Adding to 2102202021 its reverse (1202022012), we get a palindrome (3304224033).

Subtracting from 2102202021 its reverse (1202022012), we obtain a square (900180009 = 30003²).

The spelling of 2102202021 in words is "two billion, one hundred two million, two hundred two thousand, twenty-one".