1111221451 has 2 divisors, whose sum is σ = 1111221452. Its totient is φ = 1111221450.

The previous prime is 1111221413. The next prime is 1111221457. The reversal of 1111221451 is 1541221111.

It is a strong prime.

It is an emirp because it is prime and its reverse (1541221111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111221451 - 2²⁷ = 977003723 is a prime.

It is a super-2 number, since 2×1111221451² = 2469626226325090802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1111221457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555610725 + 555610726.

It is an arithmetic number, because the mean of its divisors is an integer number (555610726).

Almost surely, 2^1111221451 is an apocalyptic number.

1111221451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111221451 is an equidigital number, since it uses as much as digits as its factorization.

1111221451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80, while the sum is 19.

The square root of 1111221451 is about 33334.9883905784. The cubic root of 1111221451 is about 1035.7784526854.

Adding to 1111221451 its reverse (1541221111), we get a palindrome (2652442562).

The spelling of 1111221451 in words is "one billion, one hundred eleven million, two hundred twenty-one thousand, four hundred fifty-one".