1111220051 has 2 divisors, whose sum is σ = 1111220052. Its totient is φ = 1111220050.

The previous prime is 1111220039. The next prime is 1111220087. The reversal of 1111220051 is 1500221111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111220051 - 2⁶ = 1111219987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111220021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555610025 + 555610026.

It is an arithmetic number, because the mean of its divisors is an integer number (555610026).

Almost surely, 2^1111220051 is an apocalyptic number.

1111220051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111220051 is an equidigital number, since it uses as much as digits as its factorization.

1111220051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 14.

The square root of 1111220051 is about 33334.9673916145. The cubic root of 1111220051 is about 1035.7780177015.

Adding to 1111220051 its reverse (1500221111), we get a palindrome (2611441162).

The spelling of 1111220051 in words is "one billion, one hundred eleven million, two hundred twenty thousand, fifty-one".