21100020002 has 8 divisors (see below), whose sum is σ = 33026118336. Its totient is φ = 10091313892.

The previous prime is 21100020001. The next prime is 21100020023. The reversal of 21100020002 is 20002000112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21100020001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229347998 + ... + 229348089.

It is an arithmetic number, because the mean of its divisors is an integer number (4128264792).

Almost surely, 2^21100020002 is an apocalyptic number.

21100020002 is a deficient number, since it is larger than the sum of its proper divisors (11926098334).

21100020002 is a wasteful number, since it uses less digits than its factorization.

21100020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458696112.

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

Adding to 21100020002 its reverse (20002000112), we get a palindrome (41102020114).

The spelling of 21100020002 in words is "twenty-one billion, one hundred million, twenty thousand, two".