21220212000311 has 4 divisors (see below), whose sum is σ = 22142829913392. Its totient is φ = 20297594087232.

The previous prime is 21220212000301. The next prime is 21220212000331. The reversal of 21220212000311 is 11300021202212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21220212000311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21220212000311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220212000301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461308956506 + ... + 461308956551.

It is an arithmetic number, because the mean of its divisors is an integer number (5535707478348).

Almost surely, 2^{21220212000311} is an apocalyptic number.

21220212000311 is a deficient number, since it is larger than the sum of its proper divisors (922617913081).

21220212000311 is an equidigital number, since it uses as much as digits as its factorization.

21220212000311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922617913080.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21220212000311 its reverse (11300021202212), we get a palindrome (32520233202523).

The spelling of 21220212000311 in words is "twenty-one trillion, two hundred twenty billion, two hundred twelve million, three hundred eleven", and thus it is an aban number.