20112211222001 has 8 divisors (see below), whose sum is σ = 21296438082504. Its totient is φ = 18928112762880.

The previous prime is 20112211221959. The next prime is 20112211222007. The reversal of 20112211222001 is 10022211221102.

It can be written as a sum of positive squares in 4 ways, for example, as 10633207939600 + 9479003282401 = 3260860^2 + 3078799^2 .

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 20112211222001 - 2²² = 20112207027697 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (20112211222007) 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, 31777760 + ... + 32404481.

It is an arithmetic number, because the mean of its divisors is an integer number (2662054760313).

Almost surely, 2^{20112211222001} is an apocalyptic number.

It is an amenable number.

20112211222001 is a deficient number, since it is larger than the sum of its proper divisors (1184226860503).

20112211222001 is a wasteful number, since it uses less digits than its factorization.

20112211222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64200691.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20112211222001 its reverse (10022211221102), we get a palindrome (30134422443103).

The spelling of 20112211222001 in words is "twenty trillion, one hundred twelve billion, two hundred eleven million, two hundred twenty-two thousand, one".