124211321161 has 4 divisors (see below), whose sum is σ = 125441136324. Its totient is φ = 122981506000.

The previous prime is 124211321147. The next prime is 124211321231. The reversal of 124211321161 is 161123112421.

It is a happy number.

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 61839255625 + 62372065536 = 248675^2 + 249744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124211321161 is a prime.

It is a super-2 number, since 2×124211321161² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124211327161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 614907430 + ... + 614907631.

It is an arithmetic number, because the mean of its divisors is an integer number (31360284081).

Almost surely, 2^124211321161 is an apocalyptic number.

It is an amenable number.

124211321161 is a deficient number, since it is larger than the sum of its proper divisors (1229815163).

124211321161 is a wasteful number, since it uses less digits than its factorization.

124211321161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229815162.

The product of its digits is 576, while the sum is 25.

Adding to 124211321161 its reverse (161123112421), we get a palindrome (285334433582).

The spelling of 124211321161 in words is "one hundred twenty-four billion, two hundred eleven million, three hundred twenty-one thousand, one hundred sixty-one".