301212121421 has 2 divisors, whose sum is σ = 301212121422. Its totient is φ = 301212121420.

The previous prime is 301212121417. The next prime is 301212121471. The reversal of 301212121421 is 124121212103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195319802500 + 105892318921 = 441950^2 + 325411^2 .

It is a cyclic number.

It is not a de Polignac number, because 301212121421 - 2² = 301212121417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 301212121393 and 301212121402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (301212121471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150606060710 + 150606060711.

It is an arithmetic number, because the mean of its divisors is an integer number (150606060711).

Almost surely, 2^301212121421 is an apocalyptic number.

It is an amenable number.

301212121421 is a deficient number, since it is larger than the sum of its proper divisors (1).

301212121421 is an equidigital number, since it uses as much as digits as its factorization.

301212121421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 301212121421 its reverse (124121212103), we get a palindrome (425333333524).

The spelling of 301212121421 in words is "three hundred one billion, two hundred twelve million, one hundred twenty-one thousand, four hundred twenty-one".