21121323301320 has 192 divisors, whose sum is σ = 71894711185920. Its totient is φ = 4955149056000.

The previous prime is 21121323301303. The next prime is 21121323301391. The reversal of 21121323301320 is 2310332312112.

It is a super-2 number, since 2×21121323301320² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23011761 + ... + 23912000.

It is an arithmetic number, because the mean of its divisors is an integer number (374451620760).

Almost surely, 2^{21121323301320} is an apocalyptic number.

21121323301320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21121323301320 is an abundant number, since it is smaller than the sum of its proper divisors (50773387884600).

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

21121323301320 is a wasteful number, since it uses less digits than its factorization.

21121323301320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46923828 (or 46923813 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21121323301320 its reverse (2310332312112), we get a palindrome (23431655613432).

The spelling of 21121323301320 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred twenty-three million, three hundred one thousand, three hundred twenty".