20122041221 has 8 divisors (see below), whose sum is σ = 20709020640. Its totient is φ = 19540472112.

The previous prime is 20122041217. The next prime is 20122041229. The reversal of 20122041221 is 12214022102.

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

It is not a de Polignac number, because 20122041221 - 2² = 20122041217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20122041221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122041229) 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, 1345031 + ... + 1359908.

It is an arithmetic number, because the mean of its divisors is an integer number (2588627580).

Almost surely, 2^20122041221 is an apocalyptic number.

It is an amenable number.

20122041221 is a deficient number, since it is larger than the sum of its proper divisors (586979419).

20122041221 is a wasteful number, since it uses less digits than its factorization.

20122041221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705155.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20122041221 its reverse (12214022102), we get a palindrome (32336063323).

The spelling of 20122041221 in words is "twenty billion, one hundred twenty-two million, forty-one thousand, two hundred twenty-one".