1200421330421 has 2 divisors, whose sum is σ = 1200421330422. Its totient is φ = 1200421330420.

The previous prime is 1200421330403. The next prime is 1200421330439. The reversal of 1200421330421 is 1240331240021.

It is a balanced prime because it is at equal distance from previous prime (1200421330403) and next prime (1200421330439).

It can be written as a sum of positive squares in only one way, i.e., 733780692100 + 466640638321 = 856610^2 + 683111^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200421330421 - 2²² = 1200417136117 is a prime.

It is a super-2 number, since 2×1200421330421² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200421330621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600210665210 + 600210665211.

It is an arithmetic number, because the mean of its divisors is an integer number (600210665211).

Almost surely, 2^{1200421330421} is an apocalyptic number.

It is an amenable number.

1200421330421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200421330421 is an equidigital number, since it uses as much as digits as its factorization.

1200421330421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1200421330421 its reverse (1240331240021), we get a palindrome (2440752570442).

The spelling of 1200421330421 in words is "one trillion, two hundred billion, four hundred twenty-one million, three hundred thirty thousand, four hundred twenty-one".