21101201102012 has 24 divisors (see below), whose sum is σ = 36951590169312. Its totient is φ = 10543606142400.

The previous prime is 21101201102011. The next prime is 21101201102017. The reversal of 21101201102012 is 21020110210112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101201102011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37980062 + ... + 38531642.

It is an arithmetic number, because the mean of its divisors is an integer number (1539649590388).

Almost surely, 2^{21101201102012} is an apocalyptic number.

It is an amenable number.

21101201102012 is a deficient number, since it is larger than the sum of its proper divisors (15850389067300).

21101201102012 is a wasteful number, since it uses less digits than its factorization.

21101201102012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557909 (or 557907 counting only the distinct ones).

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

Adding to 21101201102012 its reverse (21020110210112), we get a palindrome (42121311312124).

The spelling of 21101201102012 in words is "twenty-one trillion, one hundred one billion, two hundred one million, one hundred two thousand, twelve".