21212211302113 has 8 divisors (see below), whose sum is σ = 22849851862656. Its totient is φ = 19575418170000.

The previous prime is 21212211302063. The next prime is 21212211302119. The reversal of 21212211302113 is 31120311221212.

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 not a de Polignac number, because 21212211302113 - 2²⁵ = 21212177747681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212211302119) 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 7 ways as a sum of consecutive naturals, for example, 211805113 + ... + 211905238.

It is an arithmetic number, because the mean of its divisors is an integer number (2856231482832).

Almost surely, 2^{21212211302113} is an apocalyptic number.

It is an amenable number.

21212211302113 is a deficient number, since it is larger than the sum of its proper divisors (1637640560543).

21212211302113 is a wasteful number, since it uses less digits than its factorization.

21212211302113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423714215.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21212211302113 its reverse (31120311221212), we get a palindrome (52332522523325).

The spelling of 21212211302113 in words is "twenty-one trillion, two hundred twelve billion, two hundred eleven million, three hundred two thousand, one hundred thirteen".