4021212430121 has 2 divisors, whose sum is σ = 4021212430122. Its totient is φ = 4021212430120.

The previous prime is 4021212430049. The next prime is 4021212430129. The reversal of 4021212430121 is 1210342121204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2448849414400 + 1572363015721 = 1564880^2 + 1253939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4021212430121 is a prime.

It is not a weakly prime, because it can be changed into another prime (4021212430129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010606215060 + 2010606215061.

It is an arithmetic number, because the mean of its divisors is an integer number (2010606215061).

Almost surely, 2^{4021212430121} is an apocalyptic number.

It is an amenable number.

4021212430121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021212430121 is an equidigital number, since it uses as much as digits as its factorization.

4021212430121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 4021212430121 its reverse (1210342121204), we get a palindrome (5231554551325).

The spelling of 4021212430121 in words is "four trillion, twenty-one billion, two hundred twelve million, four hundred thirty thousand, one hundred twenty-one".