1201001123 has 24 divisors (see below), whose sum is σ = 1425434400. Its totient is φ = 1011477600.

The previous prime is 1201001111. The next prime is 1201001129. The reversal of 1201001123 is 3211001021.

It is not a de Polignac number, because 1201001123 - 2⁴ = 1201001107 is a prime.

It is a super-2 number, since 2×1201001123² = 2884807394894522258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201001129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1275833 + ... + 1276773.

It is an arithmetic number, because the mean of its divisors is an integer number (59393100).

Almost surely, 2^1201001123 is an apocalyptic number.

1201001123 is a deficient number, since it is larger than the sum of its proper divisors (224433277).

1201001123 is an frugal number, since it uses more digits than its factorization.

1201001123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084 (or 1009 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1201001123 is about 34655.4631046824. The cubic root of 1201001123 is about 1062.9540014675.

Adding to 1201001123 its reverse (3211001021), we get a palindrome (4412002144).

The spelling of 1201001123 in words is "one billion, two hundred one million, one thousand, one hundred twenty-three".