1001122017221 has 4 divisors (see below), whose sum is σ = 1044649061472. Its totient is φ = 957594972972.

The previous prime is 1001122017187. The next prime is 1001122017227. The reversal of 1001122017221 is 1227102211001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1001122017221 - 2¹⁸ = 1001121755077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001122017193 and 1001122017202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001122017227) 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, 21763522091 + ... + 21763522136.

It is an arithmetic number, because the mean of its divisors is an integer number (261162265368).

Almost surely, 2^{1001122017221} is an apocalyptic number.

It is an amenable number.

1001122017221 is a deficient number, since it is larger than the sum of its proper divisors (43527044251).

1001122017221 is an equidigital number, since it uses as much as digits as its factorization.

1001122017221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43527044250.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 1001122017221 its reverse (1227102211001), we get a palindrome (2228224228222).

The spelling of 1001122017221 in words is "one trillion, one billion, one hundred twenty-two million, seventeen thousand, two hundred twenty-one".