20021201097 has 8 divisors (see below), whose sum is σ = 26698186944. Its totient is φ = 13345841328.

The previous prime is 20021201093. The next prime is 20021201111. The reversal of 20021201097 is 79010212002.

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

It is not a de Polignac number, because 20021201097 - 2² = 20021201093 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20021201093) 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, 377493 + ... + 427250.

It is an arithmetic number, because the mean of its divisors is an integer number (3337273368).

Almost surely, 2^20021201097 is an apocalyptic number.

It is an amenable number.

20021201097 is a deficient number, since it is larger than the sum of its proper divisors (6676985847).

20021201097 is an equidigital number, since it uses as much as digits as its factorization.

20021201097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813039.

The product of its (nonzero) digits is 504, while the sum is 24.

Adding to 20021201097 its reverse (79010212002), we get a palindrome (99031413099).

The spelling of 20021201097 in words is "twenty billion, twenty-one million, two hundred one thousand, ninety-seven".