1032121405561 has 4 divisors (see below), whose sum is σ = 1032562674000. Its totient is φ = 1031680137124.

The previous prime is 1032121405529. The next prime is 1032121405573. The reversal of 1032121405561 is 1655041212301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1032121405561 - 2⁵ = 1032121405529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1032121400561) 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, 220630711 + ... + 220635388.

It is an arithmetic number, because the mean of its divisors is an integer number (258140668500).

Almost surely, 2^{1032121405561} is an apocalyptic number.

It is an amenable number.

1032121405561 is a deficient number, since it is larger than the sum of its proper divisors (441268439).

1032121405561 is an equidigital number, since it uses as much as digits as its factorization.

1032121405561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441268438.

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 1032121405561 its reverse (1655041212301), we get a palindrome (2687162617862).

The spelling of 1032121405561 in words is "one trillion, thirty-two billion, one hundred twenty-one million, four hundred five thousand, five hundred sixty-one".