21002201121110 has 64 divisors (see below), whose sum is σ = 41326691883840. Its totient is φ = 7621240657920.

The previous prime is 21002201121067. The next prime is 21002201121113. The reversal of 21002201121110 is 1112110220012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002201121113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 612345482 + ... + 612379778.

It is an arithmetic number, because the mean of its divisors is an integer number (645729560685).

Almost surely, 2^{21002201121110} is an apocalyptic number.

21002201121110 is a deficient number, since it is larger than the sum of its proper divisors (20324490762730).

21002201121110 is a wasteful number, since it uses less digits than its factorization.

21002201121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45761.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21002201121110 its reverse (1112110220012), we get a palindrome (22114311341122).

The spelling of 21002201121110 in words is "twenty-one trillion, two billion, two hundred one million, one hundred twenty-one thousand, one hundred ten".