20101221212002 has 32 divisors (see below), whose sum is σ = 36611879316480. Its totient is φ = 8085123326160.

The previous prime is 20101221211999. The next prime is 20101221212027. The reversal of 20101221212002 is 20021212210102.

It is a happy number.

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, 353095374 + ... + 353152297.

It is an arithmetic number, because the mean of its divisors is an integer number (1144121228640).

Almost surely, 2^{20101221212002} is an apocalyptic number.

20101221212002 is a deficient number, since it is larger than the sum of its proper divisors (16510658104478).

20101221212002 is a wasteful number, since it uses less digits than its factorization.

20101221212002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706247806.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20101221212002 its reverse (20021212210102), we get a palindrome (40122433422104).

The spelling of 20101221212002 in words is "twenty trillion, one hundred one billion, two hundred twenty-one million, two hundred twelve thousand, two".