2102343021 has 24 divisors (see below), whose sum is σ = 3065179104. Its totient is φ = 1388489760.

The previous prime is 2102342999. The next prime is 2102343043. The reversal of 2102343021 is 1203432012.

2102343021 is a `hidden beast` number, since 210 + 2 + 3 + 430 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (2102342999) and next prime (2102343043).

It is not a de Polignac number, because 2102343021 - 2⁹ = 2102342509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102342985 and 2102343003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102343091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 428635 + ... + 433511.

It is an arithmetic number, because the mean of its divisors is an integer number (127715796).

Almost surely, 2^2102343021 is an apocalyptic number.

It is an amenable number.

2102343021 is a deficient number, since it is larger than the sum of its proper divisors (962836083).

2102343021 is a wasteful number, since it uses less digits than its factorization.

2102343021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321 (or 5318 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2102343021 is about 45851.3142777827. The cubic root of 2102343021 is about 1281.0552457311.

Adding to 2102343021 its reverse (1203432012), we get a palindrome (3305775033).

The spelling of 2102343021 in words is "two billion, one hundred two million, three hundred forty-three thousand, twenty-one".