1131122201 has 4 divisors (see below), whose sum is σ = 1233951504. Its totient is φ = 1028292900.

The previous prime is 1131122143. The next prime is 1131122233. The reversal of 1131122201 is 1022211311.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1022211311 = 11 ⋅92928301.

It is a cyclic number.

It is not a de Polignac number, because 1131122201 - 2⁶ = 1131122137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131122281) 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, 51414635 + ... + 51414656.

It is an arithmetic number, because the mean of its divisors is an integer number (308487876).

Almost surely, 2^1131122201 is an apocalyptic number.

1131122201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1131122201 is a deficient number, since it is larger than the sum of its proper divisors (102829303).

1131122201 is a wasteful number, since it uses less digits than its factorization.

1131122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102829302.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1131122201 is about 33632.1602190522. The cubic root of 1131122201 is about 1041.9251204599.

Adding to 1131122201 its reverse (1022211311), we get a palindrome (2153333512).

The spelling of 1131122201 in words is "one billion, one hundred thirty-one million, one hundred twenty-two thousand, two hundred one".