1212201011023 has 4 divisors (see below), whose sum is σ = 1213067489200. Its totient is φ = 1211334532848.

The previous prime is 1212201011011. The next prime is 1212201011053. The reversal of 1212201011023 is 3201101022121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212201011023 is a prime.

It is a super-2 number, since 2×1212201011023² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212201010988 and 1212201011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212201011053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433236990 + ... + 433239787.

It is an arithmetic number, because the mean of its divisors is an integer number (303266872300).

Almost surely, 2^{1212201011023} is an apocalyptic number.

1212201011023 is a deficient number, since it is larger than the sum of its proper divisors (866478177).

1212201011023 is an equidigital number, since it uses as much as digits as its factorization.

1212201011023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866478176.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1212201011023 its reverse (3201101022121), we get a palindrome (4413302033144).

The spelling of 1212201011023 in words is "one trillion, two hundred twelve billion, two hundred one million, eleven thousand, twenty-three".