21100220311213 has 16 divisors (see below), whose sum is σ = 21153644709120. Its totient is φ = 21046883977600.

The previous prime is 21100220311141. The next prime is 21100220311253. The reversal of 21100220311213 is 31211302200112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21100220311213 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 (21100220311253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2291256153 + ... + 2291265361.

It is an arithmetic number, because the mean of its divisors is an integer number (1322102794320).

Almost surely, 2^{21100220311213} is an apocalyptic number.

It is an amenable number.

21100220311213 is a deficient number, since it is larger than the sum of its proper divisors (53424397907).

21100220311213 is a wasteful number, since it uses less digits than its factorization.

21100220311213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13388.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21100220311213 its reverse (31211302200112), we get a palindrome (52311522511325).

The spelling of 21100220311213 in words is "twenty-one trillion, one hundred billion, two hundred twenty million, three hundred eleven thousand, two hundred thirteen".