122436145421 has 8 divisors (see below), whose sum is σ = 126668904600. Its totient is φ = 118204107840.

The previous prime is 122436145393. The next prime is 122436145457. The reversal of 122436145421 is 124541634221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 41131896100 + 81304249321 = 202810^2 + 285139^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122436145421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122436145121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176831 + ... + 525491.

It is an arithmetic number, because the mean of its divisors is an integer number (15833613075).

Almost surely, 2^122436145421 is an apocalyptic number.

It is an amenable number.

122436145421 is a deficient number, since it is larger than the sum of its proper divisors (4232759179).

122436145421 is a wasteful number, since it uses less digits than its factorization.

122436145421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360799.

The product of its digits is 46080, while the sum is 35.

Adding to 122436145421 its reverse (124541634221), we get a palindrome (246977779642).

The spelling of 122436145421 in words is "one hundred twenty-two billion, four hundred thirty-six million, one hundred forty-five thousand, four hundred twenty-one".