4221021131 has 2 divisors, whose sum is σ = 4221021132. Its totient is φ = 4221021130.

The previous prime is 4221021041. The next prime is 4221021139. The reversal of 4221021131 is 1311201224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4221021131 - 2¹⁸ = 4220758987 is a prime.

It is a super-2 number, since 2×4221021131² = 35634038776697038322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4221021139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110510565 + 2110510566.

It is an arithmetic number, because the mean of its divisors is an integer number (2110510566).

Almost surely, 2^4221021131 is an apocalyptic number.

4221021131 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221021131 is an equidigital number, since it uses as much as digits as its factorization.

4221021131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 4221021131 is about 64969.3861060731. The cubic root of 4221021131 is about 1616.1159212654.

Adding to 4221021131 its reverse (1311201224), we get a palindrome (5532222355).

The spelling of 4221021131 in words is "four billion, two hundred twenty-one million, twenty-one thousand, one hundred thirty-one".