1203123211 has 4 divisors (see below), whose sum is σ = 1215035424. Its totient is φ = 1191211000.

The previous prime is 1203123209. The next prime is 1203123217. The reversal of 1203123211 is 1123213021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1203123211 - 2¹ = 1203123209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1203123217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5955955 + ... + 5956156.

It is an arithmetic number, because the mean of its divisors is an integer number (303758856).

Almost surely, 2^1203123211 is an apocalyptic number.

1203123211 is a deficient number, since it is larger than the sum of its proper divisors (11912213).

1203123211 is a wasteful number, since it uses less digits than its factorization.

1203123211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11912212.

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

The square root of 1203123211 is about 34686.0665253355. The cubic root of 1203123211 is about 1063.5796891110.

Adding to 1203123211 its reverse (1123213021), we get a palindrome (2326336232).

The spelling of 1203123211 in words is "one billion, two hundred three million, one hundred twenty-three thousand, two hundred eleven".