111021121111919 has 2 divisors, whose sum is σ = 111021121111920. Its totient is φ = 111021121111918.

The previous prime is 111021121111907. The next prime is 111021121111933. The reversal of 111021121111919 is 919111121120111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111021121111919 is a prime.

It is a super-2 number, since 2×111021121111919² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111021121161919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510560555959 + 55510560555960.

It is an arithmetic number, because the mean of its divisors is an integer number (55510560555960).

Almost surely, 2^{111021121111919} is an apocalyptic number.

111021121111919 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021121111919 is an equidigital number, since it uses as much as digits as its factorization.

111021121111919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 32.

The spelling of 111021121111919 in words is "one hundred eleven trillion, twenty-one billion, one hundred twenty-one million, one hundred eleven thousand, nine hundred nineteen".