1111051005551 has 4 divisors (see below), whose sum is σ = 1176406947072. Its totient is φ = 1045695064032.

The previous prime is 1111051005539. The next prime is 1111051005583. The reversal of 1111051005551 is 1555001501111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1111051005551 - 2⁶ = 1111051005487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111051005551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111051005521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32677970735 + ... + 32677970768.

It is an arithmetic number, because the mean of its divisors is an integer number (294101736768).

Almost surely, 2^{1111051005551} is an apocalyptic number.

1111051005551 is a deficient number, since it is larger than the sum of its proper divisors (65355941521).

1111051005551 is an equidigital number, since it uses as much as digits as its factorization.

1111051005551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65355941520.

The product of its (nonzero) digits is 625, while the sum is 26.

Adding to 1111051005551 its reverse (1555001501111), we get a palindrome (2666052506662).

The spelling of 1111051005551 in words is "one trillion, one hundred eleven billion, fifty-one million, five thousand, five hundred fifty-one".