1200011220123 has 32 divisors (see below), whose sum is σ = 1655590313472. Its totient is φ = 772553376000.

The previous prime is 1200011220113. The next prime is 1200011220127. The reversal of 1200011220123 is 3210221100021.

It is not a de Polignac number, because 1200011220123 - 2⁶ = 1200011220059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200011220127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19462263 + ... + 19523823.

It is an arithmetic number, because the mean of its divisors is an integer number (51737197296).

Almost surely, 2^{1200011220123} is an apocalyptic number.

1200011220123 is a deficient number, since it is larger than the sum of its proper divisors (455579093349).

1200011220123 is a wasteful number, since it uses less digits than its factorization.

1200011220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62915.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1200011220123 its reverse (3210221100021), we get a palindrome (4410232320144).

The spelling of 1200011220123 in words is "one trillion, two hundred billion, eleven million, two hundred twenty thousand, one hundred twenty-three".