20020220123149 has 2 divisors, whose sum is σ = 20020220123150. Its totient is φ = 20020220123148.

The previous prime is 20020220123051. The next prime is 20020220123153. The reversal of 20020220123149 is 94132102202002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10439845655625 + 9580374467524 = 3231075^2 + 3095218^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020220123149 - 2²³ = 20020211734541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020220123159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010110061574 + 10010110061575.

It is an arithmetic number, because the mean of its divisors is an integer number (10010110061575).

Almost surely, 2^{20020220123149} is an apocalyptic number.

It is an amenable number.

20020220123149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020220123149 is an equidigital number, since it uses as much as digits as its factorization.

20020220123149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 20020220123149 in words is "twenty trillion, twenty billion, two hundred twenty million, one hundred twenty-three thousand, one hundred forty-nine".