1101223157 has 2 divisors, whose sum is σ = 1101223158. Its totient is φ = 1101223156.

The previous prime is 1101223117. The next prime is 1101223171. The reversal of 1101223157 is 7513221011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1078859716 + 22363441 = 32846^2 + 4729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101223157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101223117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550611578 + 550611579.

It is an arithmetic number, because the mean of its divisors is an integer number (550611579).

Almost surely, 2^1101223157 is an apocalyptic number.

It is an amenable number.

1101223157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101223157 is an equidigital number, since it uses as much as digits as its factorization.

1101223157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 1101223157 is about 33184.6825659068. The cubic root of 1101223157 is about 1032.6625921036.

Adding to 1101223157 its reverse (7513221011), we get a palindrome (8614444168).

The spelling of 1101223157 in words is "one billion, one hundred one million, two hundred twenty-three thousand, one hundred fifty-seven".