100121221019 has 2 divisors, whose sum is σ = 100121221020. Its totient is φ = 100121221018.

The previous prime is 100121221009. The next prime is 100121221033. The reversal of 100121221019 is 910122121001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100121221019 - 2⁴ = 100121221003 is a prime.

It is a super-2 number, since 2×100121221019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100121221009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060610509 + 50060610510.

It is an arithmetic number, because the mean of its divisors is an integer number (50060610510).

Almost surely, 2^100121221019 is an apocalyptic number.

100121221019 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121221019 is an equidigital number, since it uses as much as digits as its factorization.

100121221019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 100121221019 in words is "one hundred billion, one hundred twenty-one million, two hundred twenty-one thousand, nineteen".