10100221221991 has 2 divisors, whose sum is σ = 10100221221992. Its totient is φ = 10100221221990.

The previous prime is 10100221221973. The next prime is 10100221222019. The reversal of 10100221221991 is 19912212200101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10100221221991 - 2⁷ = 10100221221863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10100221221901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050110610995 + 5050110610996.

It is an arithmetic number, because the mean of its divisors is an integer number (5050110610996).

Almost surely, 2^{10100221221991} is an apocalyptic number.

10100221221991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10100221221991 is an equidigital number, since it uses as much as digits as its factorization.

10100221221991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 10100221221991 in words is "ten trillion, one hundred billion, two hundred twenty-one million, two hundred twenty-one thousand, nine hundred ninety-one".