21221112101002 has 16 divisors (see below), whose sum is σ = 35069272566624. Its totient is φ = 9550455490000.

The previous prime is 21221112100961. The next prime is 21221112101099. The reversal of 21221112101002 is 20010121112212.

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, 4775225524 + ... + 4775229967.

It is an arithmetic number, because the mean of its divisors is an integer number (2191829535414).

Almost surely, 2^{21221112101002} is an apocalyptic number.

21221112101002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21221112101002 is a deficient number, since it is larger than the sum of its proper divisors (13848160465622).

21221112101002 is a wasteful number, since it uses less digits than its factorization.

21221112101002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9550455605.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21221112101002 its reverse (20010121112212), we get a palindrome (41231233213214).

It can be divided in two parts, 2122111210 and 1002, that added together give a palindrome (2122112212).

The spelling of 21221112101002 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, one hundred one thousand, two".