21333331101992 has 256 divisors, whose sum is σ = 51658938777600. Its totient is φ = 8033094051840.

The previous prime is 21333331101991. The next prime is 21333331102001. The reversal of 21333331101992 is 29910113333312.

It is a happy number.

It is a super-2 number, since 2×21333331101992² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21333331101991) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 468872588 + ... + 468918084.

It is an arithmetic number, because the mean of its divisors is an integer number (201792729600).

Almost surely, 2^{21333331101992} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21333331101992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25829469388800).

21333331101992 is an abundant number, since it is smaller than the sum of its proper divisors (30325607675608).

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

21333331101992 is a wasteful number, since it uses less digits than its factorization.

21333331101992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45896 (or 45892 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 41.

The spelling of 21333331101992 in words is "twenty-one trillion, three hundred thirty-three billion, three hundred thirty-one million, one hundred one thousand, nine hundred ninety-two".