21030030033312 has 24 divisors (see below), whose sum is σ = 55203828837696. Its totient is φ = 7010010011072.

The previous prime is 21030030033277. The next prime is 21030030033347. The reversal of 21030030033312 is 21333003003012.

It is an interprime number because it is at equal distance from previous prime (21030030033277) and next prime (21030030033347).

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109531406328 + ... + 109531406519.

It is an arithmetic number, because the mean of its divisors is an integer number (2300159534904).

Almost surely, 2^{21030030033312} is an apocalyptic number.

It is an amenable number.

21030030033312 is an abundant number, since it is smaller than the sum of its proper divisors (34173798804384).

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

21030030033312 is a wasteful number, since it uses less digits than its factorization.

21030030033312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219062812860 (or 219062812852 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21030030033312 its reverse (21333003003012), we get a palindrome (42363033036324).

The spelling of 21030030033312 in words is "twenty-one trillion, thirty billion, thirty million, thirty-three thousand, three hundred twelve".