4020411101221 has 2 divisors, whose sum is σ = 4020411101222. Its totient is φ = 4020411101220.

The previous prime is 4020411101191. The next prime is 4020411101279. The reversal of 4020411101221 is 1221011140204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3955902213025 + 64508888196 = 1988945^2 + 253986^2 .

It is a cyclic number.

It is not a de Polignac number, because 4020411101221 - 2⁹ = 4020411100709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4020411101281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010205550610 + 2010205550611.

It is an arithmetic number, because the mean of its divisors is an integer number (2010205550611).

Almost surely, 2^{4020411101221} is an apocalyptic number.

It is an amenable number.

4020411101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020411101221 is an equidigital number, since it uses as much as digits as its factorization.

4020411101221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 4020411101221 its reverse (1221011140204), we get a palindrome (5241422241425).

The spelling of 4020411101221 in words is "four trillion, twenty billion, four hundred eleven million, one hundred one thousand, two hundred twenty-one".