221011029 has 6 divisors (see below), whose sum is σ = 319238166. Its totient is φ = 147340680.

The previous prime is 221010971. The next prime is 221011057. The reversal of 221011029 is 920110122.

221011029 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 151954929 + 69056100 = 12327^2 + 8310^2 .

It is not a de Polignac number, because 221011029 - 2⁸ = 221010773 is a prime.

It is a super-3 number, since 3×221011029³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221013029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12278382 + ... + 12278399.

It is an arithmetic number, because the mean of its divisors is an integer number (53206361).

Almost surely, 2^221011029 is an apocalyptic number.

It is an amenable number.

221011029 is a deficient number, since it is larger than the sum of its proper divisors (98227137).

221011029 is a wasteful number, since it uses less digits than its factorization.

221011029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24556787 (or 24556784 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 221011029 is about 14866.4396881029. The cubic root of 221011029 is about 604.6044168566.

The spelling of 221011029 in words is "two hundred twenty-one million, eleven thousand, twenty-nine".