1111211224157 has 2 divisors, whose sum is σ = 1111211224158. Its totient is φ = 1111211224156.

The previous prime is 1111211224147. The next prime is 1111211224169. The reversal of 1111211224157 is 7514221121111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 616705513636 + 494505710521 = 785306^2 + 703211^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111211224157 - 2²² = 1111207029853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111211224147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555605612078 + 555605612079.

It is an arithmetic number, because the mean of its divisors is an integer number (555605612079).

Almost surely, 2^{1111211224157} is an apocalyptic number.

It is an amenable number.

1111211224157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111211224157 is an equidigital number, since it uses as much as digits as its factorization.

1111211224157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1120, while the sum is 29.

Adding to 1111211224157 its reverse (7514221121111), we get a palindrome (8625432345268).

The spelling of 1111211224157 in words is "one trillion, one hundred eleven billion, two hundred eleven million, two hundred twenty-four thousand, one hundred fifty-seven".