4021234111021 has 2 divisors, whose sum is σ = 4021234111022. Its totient is φ = 4021234111020.

The previous prime is 4021234110977. The next prime is 4021234111033. The reversal of 4021234111021 is 1201114321204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4013154797796 + 8079313225 = 2003286^2 + 89885^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021234111021 - 2²³ = 4021225722413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4021234110983 and 4021234111001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021234111091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010617055510 + 2010617055511.

It is an arithmetic number, because the mean of its divisors is an integer number (2010617055511).

Almost surely, 2^{4021234111021} is an apocalyptic number.

It is an amenable number.

4021234111021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021234111021 is an equidigital number, since it uses as much as digits as its factorization.

4021234111021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 4021234111021 its reverse (1201114321204), we get a palindrome (5222348432225).

The spelling of 4021234111021 in words is "four trillion, twenty-one billion, two hundred thirty-four million, one hundred eleven thousand, twenty-one".