21320112002 has 24 divisors (see below), whose sum is σ = 38573634816. Its totient is φ = 8656284024.

The previous prime is 21320111987. The next prime is 21320112067. The reversal of 21320112002 is 20021102312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2104178 + ... + 2114285.

It is an arithmetic number, because the mean of its divisors is an integer number (1607234784).

Almost surely, 2^21320112002 is an apocalyptic number.

21320112002 is a deficient number, since it is larger than the sum of its proper divisors (17253522814).

21320112002 is a wasteful number, since it uses less digits than its factorization.

21320112002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218510 (or 4218491 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21320112002 its reverse (20021102312), we get a palindrome (41341214314).

The spelling of 21320112002 in words is "twenty-one billion, three hundred twenty million, one hundred twelve thousand, two".