21313220311246 has 32 divisors (see below), whose sum is σ = 35632565068320. Its totient is φ = 9501720883200.

The previous prime is 21313220311231. The next prime is 21313220311247. The reversal of 21313220311246 is 64211302231312.

It is a super-2 number, since 2×21313220311246² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313220311247) 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, 48256656 + ... + 48696316.

It is an arithmetic number, because the mean of its divisors is an integer number (1113517658385).

Almost surely, 2^{21313220311246} is an apocalyptic number.

21313220311246 is a deficient number, since it is larger than the sum of its proper divisors (14319344757074).

21313220311246 is a wasteful number, since it uses less digits than its factorization.

21313220311246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514740.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 21313220311246 its reverse (64211302231312), we get a palindrome (85524522542558).

The spelling of 21313220311246 in words is "twenty-one trillion, three hundred thirteen billion, two hundred twenty million, three hundred eleven thousand, two hundred forty-six".