2102122021 has 8 divisors (see below), whose sum is σ = 2110933440. Its totient is φ = 2093323968.

The previous prime is 2102121979. The next prime is 2102122067. The reversal of 2102122021 is 1202212012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2102122021 - 2⁹ = 2102121509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102121992 and 2102122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102122721) 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, 417165 + ... + 422173.

It is an arithmetic number, because the mean of its divisors is an integer number (263866680).

Almost surely, 2^2102122021 is an apocalyptic number.

It is an amenable number.

2102122021 is a deficient number, since it is larger than the sum of its proper divisors (8811419).

2102122021 is a wasteful number, since it uses less digits than its factorization.

2102122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6683.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2102122021 is about 45848.9042508106. The cubic root of 2102122021 is about 1281.0103556367.

Adding to 2102122021 its reverse (1202212012), we get a palindrome (3304334033).

The spelling of 2102122021 in words is "two billion, one hundred two million, one hundred twenty-two thousand, twenty-one".