21102011002 has 16 divisors (see below), whose sum is σ = 33648861600. Its totient is φ = 9896720400.

The previous prime is 21102010957. The next prime is 21102011017. The reversal of 21102011002 is 20011020112.

It is a self number, because there is not a number n which added to its sum of digits gives 21102011002.

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, 2745252 + ... + 2752927.

It is an arithmetic number, because the mean of its divisors is an integer number (2103053850).

Almost surely, 2^21102011002 is an apocalyptic number.

21102011002 is a deficient number, since it is larger than the sum of its proper divisors (12546850598).

21102011002 is a wasteful number, since it uses less digits than its factorization.

21102011002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5498301.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21102011002 its reverse (20011020112), we get a palindrome (41113031114).

The spelling of 21102011002 in words is "twenty-one billion, one hundred two million, eleven thousand, two".