1010111565551 has 8 divisors (see below), whose sum is σ = 1101953839104. Its totient is φ = 918271616920.

The previous prime is 1010111565521. The next prime is 1010111565553. The reversal of 1010111565551 is 1555651110101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1010111565551 - 2⁶ = 1010111565487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010111565553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399116 + ... + 1476318.

It is an arithmetic number, because the mean of its divisors is an integer number (137744229888).

Almost surely, 2^{1010111565551} is an apocalyptic number.

1010111565551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1010111565551 is a deficient number, since it is larger than the sum of its proper divisors (91842273553).

1010111565551 is a wasteful number, since it uses less digits than its factorization.

1010111565551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162461.

The product of its (nonzero) digits is 3750, while the sum is 32.

Adding to 1010111565551 its reverse (1555651110101), we get a palindrome (2565762675652).

The spelling of 1010111565551 in words is "one trillion, ten billion, one hundred eleven million, five hundred sixty-five thousand, five hundred fifty-one".