190221010121 has 2 divisors, whose sum is σ = 190221010122. Its totient is φ = 190221010120.

The previous prime is 190221010099. The next prime is 190221010141. The reversal of 190221010121 is 121010122091.

It is an a-pointer prime, because the next prime (190221010141) can be obtained adding 190221010121 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116595614521 + 73625395600 = 341461^2 + 271340^2 .

It is a cyclic number.

It is not a de Polignac number, because 190221010121 - 2²⁶ = 190153901257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 190221010093 and 190221010102.

It is not a weakly prime, because it can be changed into another prime (190221010141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95110505060 + 95110505061.

It is an arithmetic number, because the mean of its divisors is an integer number (95110505061).

Almost surely, 2^190221010121 is an apocalyptic number.

It is an amenable number.

190221010121 is a deficient number, since it is larger than the sum of its proper divisors (1).

190221010121 is an equidigital number, since it uses as much as digits as its factorization.

190221010121 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 190221010121 in words is "one hundred ninety billion, two hundred twenty-one million, ten thousand, one hundred twenty-one".