1200221201021 has 2 divisors, whose sum is σ = 1200221201022. Its totient is φ = 1200221201020.

The previous prime is 1200221200999. The next prime is 1200221201027. The reversal of 1200221201021 is 1201021220021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1166376240121 + 33844960900 = 1079989^2 + 183970^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200221201021 - 2³⁸ = 925343294077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200221200987 and 1200221201005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200221201027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600110600510 + 600110600511.

It is an arithmetic number, because the mean of its divisors is an integer number (600110600511).

Almost surely, 2^{1200221201021} is an apocalyptic number.

It is an amenable number.

1200221201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200221201021 is an equidigital number, since it uses as much as digits as its factorization.

1200221201021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1200221201021 its reverse (1201021220021), we get a palindrome (2401242421042).

The spelling of 1200221201021 in words is "one trillion, two hundred billion, two hundred twenty-one million, two hundred one thousand, twenty-one".