20101022221 has 8 divisors (see below), whose sum is σ = 22973614400. Its totient is φ = 17228684448.

The previous prime is 20101022191. The next prime is 20101022233. The reversal of 20101022221 is 12222010102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20101022221 - 2¹³ = 20101014029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101022281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156505 + ... + 254353.

It is an arithmetic number, because the mean of its divisors is an integer number (2871701800).

Almost surely, 2^20101022221 is an apocalyptic number.

It is an amenable number.

20101022221 is a deficient number, since it is larger than the sum of its proper divisors (2872592179).

20101022221 is an equidigital number, since it uses as much as digits as its factorization.

20101022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127203.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20101022221 its reverse (12222010102), we get a palindrome (32323032323).

The spelling of 20101022221 in words is "twenty billion, one hundred one million, twenty-two thousand, two hundred twenty-one".