22111011222001 has 16 divisors (see below), whose sum is σ = 24029283935440. Its totient is φ = 20344955379840.

The previous prime is 22111011221951. The next prime is 22111011222011. The reversal of 22111011222001 is 10022211011122.

It can be written as a sum of positive squares in 8 ways, for example, as 14653737120400 + 7457274101601 = 3828020^2 + 2730801^2 .

It is not a de Polignac number, because 22111011222001 - 2¹⁷ = 22111011090929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22111011222011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15389310 + ... + 16764631.

It is an arithmetic number, because the mean of its divisors is an integer number (1501830245965).

Almost surely, 2^{22111011222001} is an apocalyptic number.

It is an amenable number.

22111011222001 is a deficient number, since it is larger than the sum of its proper divisors (1918272713439).

22111011222001 is an equidigital number, since it uses as much as digits as its factorization.

22111011222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32154293 (or 32154267 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 22111011222001 its reverse (10022211011122), we get a palindrome (32133222233123).

The spelling of 22111011222001 in words is "twenty-two trillion, one hundred eleven billion, eleven million, two hundred twenty-two thousand, one".