611023121 has 4 divisors (see below), whose sum is σ = 612014052. Its totient is φ = 610032192.

The previous prime is 611023117. The next prime is 611023199. The reversal of 611023121 is 121320116.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134212225 + 476810896 = 11585^2 + 21836^2 .

It is a cyclic number.

It is not a de Polignac number, because 611023121 - 2² = 611023117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 611023121.

It is not an unprimeable number, because it can be changed into a prime (611023921) 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, 494540 + ... + 495773.

It is an arithmetic number, because the mean of its divisors is an integer number (153003513).

Almost surely, 2^611023121 is an apocalyptic number.

It is an amenable number.

611023121 is a deficient number, since it is larger than the sum of its proper divisors (990931).

611023121 is an equidigital number, since it uses as much as digits as its factorization.

611023121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990930.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 611023121 is about 24718.8818719618. The cubic root of 611023121 is about 848.5664977521.

Adding to 611023121 its reverse (121320116), we get a palindrome (732343237).

The spelling of 611023121 in words is "six hundred eleven million, twenty-three thousand, one hundred twenty-one".