21001001211102 has 64 divisors (see below), whose sum is σ = 46064205508608. Its totient is φ = 6330078912000.

The previous prime is 21001001211079. The next prime is 21001001211131. The reversal of 21001001211102 is 20111210010012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161808778 + ... + 161938514.

It is an arithmetic number, because the mean of its divisors is an integer number (719753211072).

Almost surely, 2^{21001001211102} is an apocalyptic number.

21001001211102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21001001211102 is an abundant number, since it is smaller than the sum of its proper divisors (25063204297506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21001001211102 is a wasteful number, since it uses less digits than its factorization.

21001001211102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142785.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21001001211102 its reverse (20111210010012), we get a palindrome (41112211221114).

The spelling of 21001001211102 in words is "twenty-one trillion, one billion, one million, two hundred eleven thousand, one hundred two".