123021361 has 16 divisors (see below), whose sum is σ = 131152896. Its totient is φ = 115200000.

The previous prime is 123021359. The next prime is 123021377. The reversal of 123021361 is 163120321.

It is a 5-Lehmer number, since φ(123021361) divides (123021361-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 123021361 - 2¹ = 123021359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123021331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191601 + ... + 192241.

It is an arithmetic number, because the mean of its divisors is an integer number (8197056).

Almost surely, 2^123021361 is an apocalyptic number.

It is an amenable number.

123021361 is a deficient number, since it is larger than the sum of its proper divisors (8131535).

123021361 is a wasteful number, since it uses less digits than its factorization.

123021361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 123021361 is about 11091.4994928549. The cubic root of 123021361 is about 497.3477709038.

Adding to 123021361 its reverse (163120321), we get a palindrome (286141682).

The spelling of 123021361 in words is "one hundred twenty-three million, twenty-one thousand, three hundred sixty-one".