201020220121979 has 2 divisors, whose sum is σ = 201020220121980. Its totient is φ = 201020220121978.

The previous prime is 201020220121949. The next prime is 201020220121993. The reversal of 201020220121979 is 979121022020102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201020220121979 - 2²⁰ = 201020219073403 is a prime.

It is not a weakly prime, because it can be changed into another prime (201020220121949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510110060989 + 100510110060990.

It is an arithmetic number, because the mean of its divisors is an integer number (100510110060990).

Almost surely, 2^{201020220121979} is an apocalyptic number.

201020220121979 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020220121979 is an equidigital number, since it uses as much as digits as its factorization.

201020220121979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 201020220121979 in words is "two hundred one trillion, twenty billion, two hundred twenty million, one hundred twenty-one thousand, nine hundred seventy-nine".