20200221120979 has 2 divisors, whose sum is σ = 20200221120980. Its totient is φ = 20200221120978.

The previous prime is 20200221120973. The next prime is 20200221121037. The reversal of 20200221120979 is 97902112200202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20200221120979 - 2⁷ = 20200221120851 is a prime.

It is not a weakly prime, because it can be changed into another prime (20200221120973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100110560489 + 10100110560490.

It is an arithmetic number, because the mean of its divisors is an integer number (10100110560490).

Almost surely, 2^{20200221120979} is an apocalyptic number.

20200221120979 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200221120979 is an equidigital number, since it uses as much as digits as its factorization.

20200221120979 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 37.

The spelling of 20200221120979 in words is "twenty trillion, two hundred billion, two hundred twenty-one million, one hundred twenty thousand, nine hundred seventy-nine".