1200021211023 has 8 divisors (see below), whose sum is σ = 1603286996736. Its totient is φ = 798384783000.

The previous prime is 1200021210979. The next prime is 1200021211043. The reversal of 1200021211023 is 3201121200021.

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

It is not a de Polignac number, because 1200021211023 - 2¹⁶ = 1200021145487 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200021210993 and 1200021211011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200021211043) 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 7 ways as a sum of consecutive naturals, for example, 407337703 + ... + 407340648.

It is an arithmetic number, because the mean of its divisors is an integer number (200410874592).

Almost surely, 2^{1200021211023} is an apocalyptic number.

1200021211023 is a deficient number, since it is larger than the sum of its proper divisors (403265785713).

1200021211023 is an equidigital number, since it uses as much as digits as its factorization.

1200021211023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814678845.

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

Adding to 1200021211023 its reverse (3201121200021), we get a palindrome (4401142411044).

The spelling of 1200021211023 in words is "one trillion, two hundred billion, twenty-one million, two hundred eleven thousand, twenty-three".