20101221000002 has 32 divisors (see below), whose sum is σ = 32685593688000. Its totient is φ = 9239410872384.

The previous prime is 20101220999963. The next prime is 20101221000041. The reversal of 20101221000002 is 20000012210102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20101220999963) and next prime (20101221000041).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1014752 + ... + 6421227.

It is an arithmetic number, because the mean of its divisors is an integer number (1021424802750).

Almost surely, 2^{20101221000002} is an apocalyptic number.

20101221000002 is a deficient number, since it is larger than the sum of its proper divisors (12584372687998).

20101221000002 is an frugal number, since it uses more digits than its factorization.

20101221000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7436127 (or 7436041 counting only the distinct ones).

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

Adding to 20101221000002 its reverse (20000012210102), we get a palindrome (40101233210104).

The spelling of 20101221000002 in words is "twenty trillion, one hundred one billion, two hundred twenty-one million, two", and thus it is an aban number.