20011222001 has 8 divisors (see below), whose sum is σ = 20122495680. Its totient is φ = 19900151568.

The previous prime is 20011221983. The next prime is 20011222003. The reversal of 20011222001 is 10022211002.

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 a de Polignac number, because none of the positive numbers 2^k-20011222001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011222003) 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, 148820 + ... + 249338.

It is an arithmetic number, because the mean of its divisors is an integer number (2515311960).

Almost surely, 2^20011222001 is an apocalyptic number.

It is an amenable number.

20011222001 is a deficient number, since it is larger than the sum of its proper divisors (111273679).

20011222001 is a wasteful number, since it uses less digits than its factorization.

20011222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101623.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20011222001 its reverse (10022211002), we get a palindrome (30033433003).

The spelling of 20011222001 in words is "twenty billion, eleven million, two hundred twenty-two thousand, one".