1201204123 has 16 divisors (see below), whose sum is σ = 1393868736. Its totient is φ = 1013852160.

The previous prime is 1201204093. The next prime is 1201204153. The reversal of 1201204123 is 3214021021.

It is an interprime number because it is at equal distance from previous prime (1201204093) and next prime (1201204153).

It is a cyclic number.

It is not a de Polignac number, because 1201204123 - 2¹⁷ = 1201073051 is a prime.

It is a super-2 number, since 2×1201204123² = 2885782690224398258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201204097 and 1201204106.

It is not an unprimeable number, because it can be changed into a prime (1201204153) 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, 393483 + ... + 396523.

It is an arithmetic number, because the mean of its divisors is an integer number (87116796).

Almost surely, 2^1201204123 is an apocalyptic number.

1201204123 is a deficient number, since it is larger than the sum of its proper divisors (192664613).

1201204123 is an equidigital number, since it uses as much as digits as its factorization.

1201204123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3894.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1201204123 is about 34658.3918120850. The cubic root of 1201204123 is about 1063.0138869252.

Adding to 1201204123 its reverse (3214021021), we get a palindrome (4415225144).

The spelling of 1201204123 in words is "one billion, two hundred one million, two hundred four thousand, one hundred twenty-three".