1111022201 has 4 divisors (see below), whose sum is σ = 1111117812. Its totient is φ = 1110926592.

The previous prime is 1111022191. The next prime is 1111022257. The reversal of 1111022201 is 1022201111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 499746025 + 611276176 = 22355^2 + 24724^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111022201 - 2³⁰ = 37280377 is a prime.

It is a super-2 number, since 2×1111022201² = 2468740662229768802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111022501) 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, 27500 + ... + 54573.

It is an arithmetic number, because the mean of its divisors is an integer number (277779453).

Almost surely, 2^1111022201 is an apocalyptic number.

It is an amenable number.

1111022201 is a deficient number, since it is larger than the sum of its proper divisors (95611).

1111022201 is an equidigital number, since it uses as much as digits as its factorization.

1111022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95610.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1111022201 is about 33331.9996549862. Note that the first 3 decimals coincide. The cubic root of 1111022201 is about 1035.7165414756.

Adding to 1111022201 its reverse (1022201111), we get a palindrome (2133223312).

It can be divided in two parts, 111 and 1022201, that multiplied together give a palindrome (113464311).

The spelling of 1111022201 in words is "one billion, one hundred eleven million, twenty-two thousand, two hundred one".