21002214104 has 32 divisors (see below), whose sum is σ = 39507652800. Its totient is φ = 10466887200.

The previous prime is 21002214061. The next prime is 21002214113. The reversal of 21002214104 is 40141220012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5451779 + ... + 5455629.

It is an arithmetic number, because the mean of its divisors is an integer number (1234614150).

Almost surely, 2^21002214104 is an apocalyptic number.

It is an amenable number.

21002214104 is a deficient number, since it is larger than the sum of its proper divisors (18505438696).

21002214104 is a wasteful number, since it uses less digits than its factorization.

21002214104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5903 (or 5899 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21002214104 its reverse (40141220012), we get a palindrome (61143434116).

The spelling of 21002214104 in words is "twenty-one billion, two million, two hundred fourteen thousand, one hundred four".