21101022002 has 16 divisors (see below), whose sum is σ = 31787078400. Its totient is φ = 10505426640.

The previous prime is 21101021987. The next prime is 21101022011. The reversal of 21101022002 is 20022010112.

It is a happy 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, 417749 + ... + 465527.

It is an arithmetic number, because the mean of its divisors is an integer number (1986692400).

Almost surely, 2^21101022002 is an apocalyptic number.

21101022002 is a deficient number, since it is larger than the sum of its proper divisors (10686056398).

21101022002 is a wasteful number, since it uses less digits than its factorization.

21101022002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48721.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21101022002 its reverse (20022010112), we get a palindrome (41123032114).

The spelling of 21101022002 in words is "twenty-one billion, one hundred one million, twenty-two thousand, two".