1212023161 has 8 divisors (see below), whose sum is σ = 1235073024. Its totient is φ = 1189147680.

The previous prime is 1212023123. The next prime is 1212023173. The reversal of 1212023161 is 1613202121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212023161 - 2¹¹ = 1212021113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212023191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29521 + ... + 57406.

It is an arithmetic number, because the mean of its divisors is an integer number (154384128).

Almost surely, 2^1212023161 is an apocalyptic number.

It is an amenable number.

1212023161 is a deficient number, since it is larger than the sum of its proper divisors (23049863).

1212023161 is an equidigital number, since it uses as much as digits as its factorization.

1212023161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87191.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1212023161 is about 34814.1230106404. The cubic root of 1212023161 is about 1066.1958137448.

Adding to 1212023161 its reverse (1613202121), we get a palindrome (2825225282).

The spelling of 1212023161 in words is "one billion, two hundred twelve million, twenty-three thousand, one hundred sixty-one".