1011142220551 has 4 divisors (see below), whose sum is σ = 1038470388712. Its totient is φ = 983814052392.

The previous prime is 1011142220521. The next prime is 1011142220563. The reversal of 1011142220551 is 1550222411101.

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 1011142220551 - 2¹¹ = 1011142218503 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 (1011142220521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13664084025 + ... + 13664084098.

It is an arithmetic number, because the mean of its divisors is an integer number (259617597178).

Almost surely, 2^{1011142220551} is an apocalyptic number.

1011142220551 is a deficient number, since it is larger than the sum of its proper divisors (27328168161).

1011142220551 is an equidigital number, since it uses as much as digits as its factorization.

1011142220551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27328168160.

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 1011142220551 its reverse (1550222411101), we get a palindrome (2561364631652).

The spelling of 1011142220551 in words is "one trillion, eleven billion, one hundred forty-two million, two hundred twenty thousand, five hundred fifty-one".