2102313021 has 16 divisors (see below), whose sum is σ = 2834682048. Its totient is φ = 1385820800.

The previous prime is 2102313001. The next prime is 2102313061. The reversal of 2102313021 is 1203132012.

It is a cyclic number.

It is not a de Polignac number, because 2102313021 - 2²⁷ = 1968095293 is a prime.

It is a super-2 number, since 2×2102313021² = 8839440076532292882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102313001) 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 15 ways as a sum of consecutive naturals, for example, 100915 + ... + 119951.

It is an arithmetic number, because the mean of its divisors is an integer number (177167628).

Almost surely, 2^2102313021 is an apocalyptic number.

It is an amenable number.

2102313021 is a deficient number, since it is larger than the sum of its proper divisors (732369027).

2102313021 is a wasteful number, since it uses less digits than its factorization.

2102313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19452.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2102313021 is about 45850.9871322309. The cubic root of 2102313021 is about 1281.0491522377.

Adding to 2102313021 its reverse (1203132012), we get a palindrome (3305445033).

The spelling of 2102313021 in words is "two billion, one hundred two million, three hundred thirteen thousand, twenty-one".