1201223023 has 48 divisors (see below), whose sum is σ = 1639751680. Its totient is φ = 856215360.

The previous prime is 1201223011. The next prime is 1201223027. The reversal of 1201223023 is 3203221021.

1201223023 = 137² + 138² + ... + 1533².

It is not a de Polignac number, because 1201223023 - 2⁵ = 1201222991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201222988 and 1201223006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201223027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1397968 + ... + 1398826.

Almost surely, 2^1201223023 is an apocalyptic number.

1201223023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1201223023 is a deficient number, since it is larger than the sum of its proper divisors (438528657).

1201223023 is a wasteful number, since it uses less digits than its factorization.

1201223023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1201223023 is about 34658.6644722499. The cubic root of 1201223023 is about 1063.0194621245.

Adding to 1201223023 its reverse (3203221021), we get a palindrome (4404444044).

The spelling of 1201223023 in words is "one billion, two hundred one million, two hundred twenty-three thousand, twenty-three".