1211203123017 has 8 divisors (see below), whose sum is σ = 1658584456896. Its totient is φ = 785645268912.

The previous prime is 1211203123007. The next prime is 1211203123021. The reversal of 1211203123017 is 7103213021121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211203123017 - 2⁴ = 1211203123001 is a prime.

It is a super-2 number, since 2×1211203123017² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211203123007) 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, 5455869813 + ... + 5455870034.

It is an arithmetic number, because the mean of its divisors is an integer number (207323057112).

Almost surely, 2^{1211203123017} is an apocalyptic number.

It is an amenable number.

1211203123017 is a deficient number, since it is larger than the sum of its proper divisors (447381333879).

1211203123017 is a wasteful number, since it uses less digits than its factorization.

1211203123017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10911739887.

The product of its (nonzero) digits is 504, while the sum is 24.

Adding to 1211203123017 its reverse (7103213021121), we get a palindrome (8314416144138).

The spelling of 1211203123017 in words is "one trillion, two hundred eleven billion, two hundred three million, one hundred twenty-three thousand, seventeen".