20211022997 has 8 divisors (see below), whose sum is σ = 22171566240. Its totient is φ = 18271009360.

The previous prime is 20211022991. The next prime is 20211023009. The reversal of 20211022997 is 79922011202.

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 20211022997 - 2¹⁰ = 20211021973 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 (20211022991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5130338 + ... + 5134275.

It is an arithmetic number, because the mean of its divisors is an integer number (2771445780).

Almost surely, 2^20211022997 is an apocalyptic number.

It is an amenable number.

20211022997 is a deficient number, since it is larger than the sum of its proper divisors (1960543243).

20211022997 is a wasteful number, since it uses less digits than its factorization.

20211022997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10264803.

The product of its (nonzero) digits is 9072, while the sum is 35.

The spelling of 20211022997 in words is "twenty billion, two hundred eleven million, twenty-two thousand, nine hundred ninety-seven".