1122042251 has 4 divisors (see below), whose sum is σ = 1224046104. Its totient is φ = 1020038400.

The previous prime is 1122042239. The next prime is 1122042253. The reversal of 1122042251 is 1522402211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1522402211 = 11 ⋅138400201.

It is a cyclic number.

It is not a de Polignac number, because 1122042251 - 2²² = 1117847947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1122042253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51001910 + ... + 51001931.

It is an arithmetic number, because the mean of its divisors is an integer number (306011526).

Almost surely, 2^1122042251 is an apocalyptic number.

1122042251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1122042251 is a deficient number, since it is larger than the sum of its proper divisors (102003853).

1122042251 is a wasteful number, since it uses less digits than its factorization.

1122042251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102003852.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1122042251 is about 33496.8991251429. The cubic root of 1122042251 is about 1039.1296499725.

Adding to 1122042251 its reverse (1522402211), we get a palindrome (2644444462).

The spelling of 1122042251 in words is "one billion, one hundred twenty-two million, forty-two thousand, two hundred fifty-one".