1121381061 has 4 divisors (see below), whose sum is σ = 1495174752. Its totient is φ = 747587372.

The previous prime is 1121381059. The next prime is 1121381087. The reversal of 1121381061 is 1601831211.

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 1121381061 - 2¹ = 1121381059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121381021) 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, 186896841 + ... + 186896846.

It is an arithmetic number, because the mean of its divisors is an integer number (373793688).

Almost surely, 2^1121381061 is an apocalyptic number.

It is an amenable number.

1121381061 is a deficient number, since it is larger than the sum of its proper divisors (373793691).

1121381061 is an equidigital number, since it uses as much as digits as its factorization.

1121381061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373793690.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 1121381061 is about 33487.0282497567. The cubic root of 1121381061 is about 1038.9254992723.

The spelling of 1121381061 in words is "one billion, one hundred twenty-one million, three hundred eighty-one thousand, sixty-one".