12702356021 has 12 divisors (see below), whose sum is σ = 13678371492. Its totient is φ = 11791369728.

The previous prime is 12702355997. The next prime is 12702356041. The reversal of 12702356021 is 12065320721.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2161227121 + 10541128900 = 46489^2 + 102670^2 .

It is not a de Polignac number, because 12702356021 - 2⁶ = 12702355957 is a prime.

It is a super-2 number, since 2×12702356021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12702356041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 279950 + ... + 322143.

It is an arithmetic number, because the mean of its divisors is an integer number (1139864291).

Almost surely, 2^12702356021 is an apocalyptic number.

It is an amenable number.

12702356021 is a deficient number, since it is larger than the sum of its proper divisors (976015471).

12702356021 is an equidigital number, since it uses as much as digits as its factorization.

12702356021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602200 (or 602183 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 12702356021 its reverse (12065320721), we get a palindrome (24767676742).

The spelling of 12702356021 in words is "twelve billion, seven hundred two million, three hundred fifty-six thousand, twenty-one".