220101121993 has 2 divisors, whose sum is σ = 220101121994. Its totient is φ = 220101121992.

The previous prime is 220101121939. The next prime is 220101122029. The reversal of 220101121993 is 399121101022.

Together with previous prime (220101121939) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171327282889 + 48773839104 = 413917^2 + 220848^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220101121993 is a prime.

It is not a weakly prime, because it can be changed into another prime (220101124993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110050560996 + 110050560997.

It is an arithmetic number, because the mean of its divisors is an integer number (110050560997).

Almost surely, 2^220101121993 is an apocalyptic number.

It is an amenable number.

220101121993 is a deficient number, since it is larger than the sum of its proper divisors (1).

220101121993 is an equidigital number, since it uses as much as digits as its factorization.

220101121993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 220101121993 in words is "two hundred twenty billion, one hundred one million, one hundred twenty-one thousand, nine hundred ninety-three".