111120021953 has 2 divisors, whose sum is σ = 111120021954. Its totient is φ = 111120021952.

The previous prime is 111120021893. The next prime is 111120021959. The reversal of 111120021953 is 359120021111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110884338049 + 235683904 = 332993^2 + 15352^2 .

It is a cyclic number.

It is not a de Polignac number, because 111120021953 - 2⁸ = 111120021697 is a prime.

It is not a weakly prime, because it can be changed into another prime (111120021959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560010976 + 55560010977.

It is an arithmetic number, because the mean of its divisors is an integer number (55560010977).

Almost surely, 2^111120021953 is an apocalyptic number.

It is an amenable number.

111120021953 is a deficient number, since it is larger than the sum of its proper divisors (1).

111120021953 is an equidigital number, since it uses as much as digits as its factorization.

111120021953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 26.

The spelling of 111120021953 in words is "one hundred eleven billion, one hundred twenty million, twenty-one thousand, nine hundred fifty-three".