221142029 has 2 divisors, whose sum is σ = 221142030. Its totient is φ = 221142028.

The previous prime is 221142013. The next prime is 221142041. The reversal of 221142029 is 920241122.

221142029 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177555625 + 43586404 = 13325^2 + 6602^2 .

It is a cyclic number.

It is not a de Polignac number, because 221142029 - 2⁴ = 221142013 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 221141995 and 221142013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221142049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110571014 + 110571015.

It is an arithmetic number, because the mean of its divisors is an integer number (110571015).

Almost surely, 2^221142029 is an apocalyptic number.

It is an amenable number.

221142029 is a deficient number, since it is larger than the sum of its proper divisors (1).

221142029 is an equidigital number, since it uses as much as digits as its factorization.

221142029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 221142029 is about 14870.8449322828. The cubic root of 221142029 is about 604.7238491090.

The spelling of 221142029 in words is "two hundred twenty-one million, one hundred forty-two thousand, twenty-nine".