21012101211013 has 8 divisors (see below), whose sum is σ = 24270662361600. Its totient is φ = 17978268415680.

The previous prime is 21012101211007. The next prime is 21012101211029. The reversal of 21012101211013 is 31011210121012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21012101211013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012101211313) 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, 56182088613 + ... + 56182088986.

It is an arithmetic number, because the mean of its divisors is an integer number (3033832795200).

Almost surely, 2^{21012101211013} is an apocalyptic number.

It is an amenable number.

21012101211013 is a deficient number, since it is larger than the sum of its proper divisors (3258561150587).

21012101211013 is a wasteful number, since it uses less digits than its factorization.

21012101211013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112364177627.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21012101211013 its reverse (31011210121012), we get a palindrome (52023311332025).

The spelling of 21012101211013 in words is "twenty-one trillion, twelve billion, one hundred one million, two hundred eleven thousand, thirteen".