20001222997 has 8 divisors (see below), whose sum is σ = 22861383552. Its totient is φ = 17141773200.

The previous prime is 20001222991. The next prime is 20001223007. The reversal of 20001222997 is 79922210002.

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 20001222997 - 2⁷ = 20001222869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001222991) 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, 115954 + ... + 231187.

It is an arithmetic number, because the mean of its divisors is an integer number (2857672944).

Almost surely, 2^20001222997 is an apocalyptic number.

It is an amenable number.

20001222997 is a deficient number, since it is larger than the sum of its proper divisors (2860160555).

20001222997 is an equidigital number, since it uses as much as digits as its factorization.

20001222997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355379.

The product of its (nonzero) digits is 9072, while the sum is 34.

Adding to 20001222997 its reverse (79922210002), we get a palindrome (99923432999).

The spelling of 20001222997 in words is "twenty billion, one million, two hundred twenty-two thousand, nine hundred ninety-seven".