21012402302 has 4 divisors (see below), whose sum is σ = 31518603456. Its totient is φ = 10506201150.

The previous prime is 21012402277. The next prime is 21012402409. The reversal of 21012402302 is 20320421012.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5253100574 + ... + 5253100577.

It is an arithmetic number, because the mean of its divisors is an integer number (7879650864).

Almost surely, 2^21012402302 is an apocalyptic number.

21012402302 is a deficient number, since it is larger than the sum of its proper divisors (10506201154).

21012402302 is a wasteful number, since it uses less digits than its factorization.

21012402302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10506201153.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21012402302 its reverse (20320421012), we get a palindrome (41332823314).

The spelling of 21012402302 in words is "twenty-one billion, twelve million, four hundred two thousand, three hundred two".