1200221221023 has 24 divisors (see below), whose sum is σ = 1942372760016. Its totient is φ = 707747155200.

The previous prime is 1200221221019. The next prime is 1200221221081. The reversal of 1200221221023 is 3201221220021.

1200221221023 is a `hidden beast` number, since 1 + 200 + 221 + 221 + 0 + 23 = 666.

It is not a de Polignac number, because 1200221221023 - 2² = 1200221221019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200221220987 and 1200221221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200221221013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163826698 + ... + 163834023.

It is an arithmetic number, because the mean of its divisors is an integer number (80932198334).

Almost surely, 2^{1200221221023} is an apocalyptic number.

1200221221023 is a deficient number, since it is larger than the sum of its proper divisors (742151538993).

1200221221023 is a wasteful number, since it uses less digits than its factorization.

1200221221023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327660775 (or 327660772 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1200221221023 its reverse (3201221220021), we get a palindrome (4401442441044).

The spelling of 1200221221023 in words is "one trillion, two hundred billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty-three".