1200222001021 has 8 divisors (see below), whose sum is σ = 1209608456184. Its totient is φ = 1190844614400.

The previous prime is 1200222000977. The next prime is 1200222001081. The reversal of 1200222001021 is 1201002220021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 493806965796 + 706415035225 = 702714^2 + 840485^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1200222001021 - 2²³ = 1200213612413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200222000992 and 1200222001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200222001081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2001280 + ... + 2530921.

It is an arithmetic number, because the mean of its divisors is an integer number (151201057023).

Almost surely, 2^{1200222001021} is an apocalyptic number.

It is an amenable number.

1200222001021 is a deficient number, since it is larger than the sum of its proper divisors (9386455163).

1200222001021 is a wasteful number, since it uses less digits than its factorization.

1200222001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4534271.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1200222001021 its reverse (1201002220021), we get a palindrome (2401224221042).

The spelling of 1200222001021 in words is "one trillion, two hundred billion, two hundred twenty-two million, one thousand, twenty-one".