220011122001001 has 4 divisors (see below), whose sum is σ = 220033343112004. Its totient is φ = 219988900890000.

The previous prime is 220011122000993. The next prime is 220011122001067. The reversal of 220011122001001 is 100100221110022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 214796841090601 + 5214280910400 = 14655949^2 + 2283480^2 .

It is a cyclic number.

It is not a de Polignac number, because 220011122001001 - 2³ = 220011122000993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220011122001701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11110540650 + ... + 11110560451.

It is an arithmetic number, because the mean of its divisors is an integer number (55008335778001).

Almost surely, 2^{220011122001001} is an apocalyptic number.

It is an amenable number.

220011122001001 is a deficient number, since it is larger than the sum of its proper divisors (22221111003).

220011122001001 is an equidigital number, since it uses as much as digits as its factorization.

220011122001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22221111002.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 220011122001001 its reverse (100100221110022), we get a palindrome (320111343111023).

The spelling of 220011122001001 in words is "two hundred twenty trillion, eleven billion, one hundred twenty-two million, one thousand, one".