121210212330421 has 2 divisors, whose sum is σ = 121210212330422. Its totient is φ = 121210212330420.

The previous prime is 121210212330413. The next prime is 121210212330469. The reversal of 121210212330421 is 124033212012121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85119795629521 + 36090416700900 = 9226039^2 + 6007530^2 .

It is a cyclic number.

It is not a de Polignac number, because 121210212330421 - 2³ = 121210212330413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121210212330401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605106165210 + 60605106165211.

It is an arithmetic number, because the mean of its divisors is an integer number (60605106165211).

Almost surely, 2^{121210212330421} is an apocalyptic number.

It is an amenable number.

121210212330421 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210212330421 is an equidigital number, since it uses as much as digits as its factorization.

121210212330421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 121210212330421 its reverse (124033212012121), we get a palindrome (245243424342542).

The spelling of 121210212330421 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred twelve million, three hundred thirty thousand, four hundred twenty-one".