20111222001 has 8 divisors (see below), whose sum is σ = 28877652160. Its totient is φ = 12376136592.

The previous prime is 20111221997. The next prime is 20111222059. The reversal of 20111222001 is 10022211102.

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

It is not a de Polignac number, because 20111222001 - 2² = 20111221997 is a prime.

It is a super-2 number, since 2×20111222001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111222501) 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, 257836141 + ... + 257836218.

It is an arithmetic number, because the mean of its divisors is an integer number (3609706520).

Almost surely, 2^20111222001 is an apocalyptic number.

It is an amenable number.

20111222001 is a deficient number, since it is larger than the sum of its proper divisors (8766430159).

20111222001 is a wasteful number, since it uses less digits than its factorization.

20111222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515672375.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20111222001 its reverse (10022211102), we get a palindrome (30133433103).

The spelling of 20111222001 in words is "twenty billion, one hundred eleven million, two hundred twenty-two thousand, one".