21121323312000 has 256 divisors, whose sum is σ = 71909549225280. Its totient is φ = 5480126668800.

The previous prime is 21121323311999. The next prime is 21121323312073. The reversal of 21121323312000 is 21332312112.

It is a super-2 number, since 2×21121323312000² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4170319 + ... + 7722318.

Almost surely, 2^{21121323312000} is an apocalyptic number.

21121323312000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21121323312000 is an abundant number, since it is smaller than the sum of its proper divisors (50788225913280).

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

21121323312000 is a wasteful number, since it uses less digits than its factorization.

21121323312000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11892706 (or 11892684 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21121323312000 its reverse (21332312112), we get a palindrome (21142655624112).

The spelling of 21121323312000 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred twenty-three million, three hundred twelve thousand".