20201032221 has 16 divisors (see below), whose sum is σ = 29182342464. Its totient is φ = 12380385024.

The previous prime is 20201032217. The next prime is 20201032283. The reversal of 20201032221 is 12223010202.

It is a happy number.

It is not a de Polignac number, because 20201032221 - 2² = 20201032217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20201032221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201032421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4603606 + ... + 4607991.

It is an arithmetic number, because the mean of its divisors is an integer number (1823896404).

Almost surely, 2^20201032221 is an apocalyptic number.

It is an amenable number.

20201032221 is a deficient number, since it is larger than the sum of its proper divisors (8981310243).

20201032221 is a wasteful number, since it uses less digits than its factorization.

20201032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9211660.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20201032221 its reverse (12223010202), we get a palindrome (32424042423).

The spelling of 20201032221 in words is "twenty billion, two hundred one million, thirty-two thousand, two hundred twenty-one".