20200221121009 has 4 divisors (see below), whose sum is σ = 20501716958704. Its totient is φ = 19898725283316.

The previous prime is 20200221120979. The next prime is 20200221121037. The reversal of 20200221121009 is 90012112200202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20200221121009 - 2⁷ = 20200221120881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20200221121039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150747918747 + ... + 150747918880.

It is an arithmetic number, because the mean of its divisors is an integer number (5125429239676).

Almost surely, 2^{20200221121009} is an apocalyptic number.

It is an amenable number.

20200221121009 is a deficient number, since it is larger than the sum of its proper divisors (301495837695).

20200221121009 is an equidigital number, since it uses as much as digits as its factorization.

20200221121009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301495837694.

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

The spelling of 20200221121009 in words is "twenty trillion, two hundred billion, two hundred twenty-one million, one hundred twenty-one thousand, nine".