1221000112023 has 16 divisors (see below), whose sum is σ = 1652947059456. Its totient is φ = 801536155200.

The previous prime is 1221000111967. The next prime is 1221000112061. The reversal of 1221000112023 is 3202110001221.

It is a de Polignac number, because none of the positive numbers 2^k-1221000112023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221000111993 and 1221000112011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221000112723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 677886 + ... + 1703387.

It is an arithmetic number, because the mean of its divisors is an integer number (103309191216).

Almost surely, 2^{1221000112023} is an apocalyptic number.

1221000112023 is a deficient number, since it is larger than the sum of its proper divisors (431946947433).

1221000112023 is a wasteful number, since it uses less digits than its factorization.

1221000112023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383894.

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

Adding to 1221000112023 its reverse (3202110001221), we get a palindrome (4423110113244).

The spelling of 1221000112023 in words is "one trillion, two hundred twenty-one billion, one hundred twelve thousand, twenty-three".