611161121 has 4 divisors (see below), whose sum is σ = 618524592. Its totient is φ = 603797652.

The previous prime is 611161099. The next prime is 611161127. The reversal of 611161121 is 121161116.

It is a happy number.

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 611161121 - 2¹⁰ = 611160097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 611161093 and 611161102.

It is not an unprimeable number, because it can be changed into a prime (611161127) 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, 3681611 + ... + 3681776.

It is an arithmetic number, because the mean of its divisors is an integer number (154631148).

Almost surely, 2^611161121 is an apocalyptic number.

It is an amenable number.

611161121 is a deficient number, since it is larger than the sum of its proper divisors (7363471).

611161121 is an equidigital number, since it uses as much as digits as its factorization.

611161121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7363470.

The product of its digits is 72, while the sum is 20.

The square root of 611161121 is about 24721.6731027655. The cubic root of 611161121 is about 848.6303760560.

The spelling of 611161121 in words is "six hundred eleven million, one hundred sixty-one thousand, one hundred twenty-one".