1201231123 has 8 divisors (see below), whose sum is σ = 1234920960. Its totient is φ = 1167880200.

The previous prime is 1201231117. The next prime is 1201231153. The reversal of 1201231123 is 3211321021.

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 1201231123 - 2¹⁷ = 1201100051 is a prime.

It is a super-2 number, since 2×1201231123² = 2885912421727682258, 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 = 1201231097 and 1201231106.

It is not an unprimeable number, because it can be changed into a prime (1201231153) 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, 77533 + ... + 91726.

It is an arithmetic number, because the mean of its divisors is an integer number (154365120).

Almost surely, 2^1201231123 is an apocalyptic number.

1201231123 is a deficient number, since it is larger than the sum of its proper divisors (33689837).

1201231123 is a wasteful number, since it uses less digits than its factorization.

1201231123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169457.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1201231123 is about 34658.7813259497. The cubic root of 1201231123 is about 1063.0218514777.

Adding to 1201231123 its reverse (3211321021), we get a palindrome (4412552144).

It can be divided in two parts, 1201 and 231123, that added together give a square (232324 = 482²).

The spelling of 1201231123 in words is "one billion, two hundred one million, two hundred thirty-one thousand, one hundred twenty-three".