1011010221 has 24 divisors (see below), whose sum is σ = 1621877760. Its totient is φ = 622157328.

The previous prime is 1011010219. The next prime is 1011010229. The reversal of 1011010221 is 1220101101.

It is a happy number.

1011010221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1011010221 - 2¹ = 1011010219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011010229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106221 + ... + 115346.

It is an arithmetic number, because the mean of its divisors is an integer number (67578240).

Almost surely, 2^1011010221 is an apocalyptic number.

It is an amenable number.

1011010221 is a deficient number, since it is larger than the sum of its proper divisors (610867539).

1011010221 is a wasteful number, since it uses less digits than its factorization.

1011010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221602 (or 221583 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1011010221 is about 31796.3869173842. The cubic root of 1011010221 is about 1003.6566860158.

Adding to 1011010221 its reverse (1220101101), we get a palindrome (2231111322).

The spelling of 1011010221 in words is "one billion, eleven million, ten thousand, two hundred twenty-one".