1131003561021 has 8 divisors (see below), whose sum is σ = 1510232231904. Its totient is φ = 752888632080.

The previous prime is 1131003561019. The next prime is 1131003561101. The reversal of 1131003561021 is 1201653001311.

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

It is not a de Polignac number, because 1131003561021 - 2¹ = 1131003561019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131003560982 and 1131003561000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131003568021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278433115 + ... + 278437176.

It is an arithmetic number, because the mean of its divisors is an integer number (188779028988).

Almost surely, 2^{1131003561021} is an apocalyptic number.

It is an amenable number.

1131003561021 is a deficient number, since it is larger than the sum of its proper divisors (379228670883).

1131003561021 is an equidigital number, since it uses as much as digits as its factorization.

1131003561021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556870971.

The product of its (nonzero) digits is 540, while the sum is 24.

Adding to 1131003561021 its reverse (1201653001311), we get a palindrome (2332656562332).

The spelling of 1131003561021 in words is "one trillion, one hundred thirty-one billion, three million, five hundred sixty-one thousand, twenty-one".