1122020251 has 8 divisors (see below), whose sum is σ = 1228575600. Its totient is φ = 1016223840.

The previous prime is 1122020239. The next prime is 1122020323. The reversal of 1122020251 is 1520202211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1122020251 - 2⁹ = 1122019739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1122020651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186636 + ... + 192553.

It is an arithmetic number, because the mean of its divisors is an integer number (153571950).

Almost surely, 2^1122020251 is an apocalyptic number.

1122020251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1122020251 is a deficient number, since it is larger than the sum of its proper divisors (106555349).

1122020251 is a wasteful number, since it uses less digits than its factorization.

1122020251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379469.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1122020251 is about 33496.5707349275. The cubic root of 1122020251 is about 1039.1228584868.

Adding to 1122020251 its reverse (1520202211), we get a palindrome (2642222462).

The spelling of 1122020251 in words is "one billion, one hundred twenty-two million, twenty thousand, two hundred fifty-one".