220021100149 has 2 divisors, whose sum is σ = 220021100150. Its totient is φ = 220021100148.

The previous prime is 220021100099. The next prime is 220021100161. The reversal of 220021100149 is 941001120022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126207536049 + 93813564100 = 355257^2 + 306290^2 .

It is a cyclic number.

It is not a de Polignac number, because 220021100149 - 2⁷ = 220021100021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220021100449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010550074 + 110010550075.

It is an arithmetic number, because the mean of its divisors is an integer number (110010550075).

Almost surely, 2^220021100149 is an apocalyptic number.

It is an amenable number.

220021100149 is a deficient number, since it is larger than the sum of its proper divisors (1).

220021100149 is an equidigital number, since it uses as much as digits as its factorization.

220021100149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 220021100149 in words is "two hundred twenty billion, twenty-one million, one hundred thousand, one hundred forty-nine".