30233020221991 has 2 divisors, whose sum is σ = 30233020221992. Its totient is φ = 30233020221990.

The previous prime is 30233020221977. The next prime is 30233020222033. The reversal of 30233020221991 is 19912202033203.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30233020221991 - 2⁵ = 30233020221959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30233020221991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30233020921991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15116510110995 + 15116510110996.

It is an arithmetic number, because the mean of its divisors is an integer number (15116510110996).

Almost surely, 2^{30233020221991} is an apocalyptic number.

30233020221991 is a deficient number, since it is larger than the sum of its proper divisors (1).

30233020221991 is an equidigital number, since it uses as much as digits as its factorization.

30233020221991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 37.

The spelling of 30233020221991 in words is "thirty trillion, two hundred thirty-three billion, twenty million, two hundred twenty-one thousand, nine hundred ninety-one".