11111100121963 has 2 divisors, whose sum is σ = 11111100121964. Its totient is φ = 11111100121962.

The previous prime is 11111100121939. The next prime is 11111100122009. The reversal of 11111100121963 is 36912100111111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11111100121963 - 2²¹ = 11111098024811 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111100821963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555550060981 + 5555550060982.

It is an arithmetic number, because the mean of its divisors is an integer number (5555550060982).

Almost surely, 2^{11111100121963} is an apocalyptic number.

11111100121963 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111100121963 is an equidigital number, since it uses as much as digits as its factorization.

11111100121963 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 28.

The spelling of 11111100121963 in words is "eleven trillion, one hundred eleven billion, one hundred million, one hundred twenty-one thousand, nine hundred sixty-three".