21011232311320 has 32 divisors (see below), whose sum is σ = 47415555439200. Its totient is φ = 8379553771008.

The previous prime is 21011232311317. The next prime is 21011232311339. The reversal of 21011232311320 is 2311323211012.

It is a junction number, because it is equal to n+sod(n) for n = 21011232311291 and 21011232311300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 779334900 + ... + 779361859.

It is an arithmetic number, because the mean of its divisors is an integer number (1481736107475).

Almost surely, 2^{21011232311320} is an apocalyptic number.

21011232311320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011232311320 is an abundant number, since it is smaller than the sum of its proper divisors (26404323127880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21011232311320 is a wasteful number, since it uses less digits than its factorization.

21011232311320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558697107 (or 1558697103 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21011232311320 its reverse (2311323211012), we get a palindrome (23322555522332).

The spelling of 21011232311320 in words is "twenty-one trillion, eleven billion, two hundred thirty-two million, three hundred eleven thousand, three hundred twenty".