9010101221 has 16 divisors (see below), whose sum is σ = 9863985600. Its totient is φ = 8162075520.

The previous prime is 9010101203. The next prime is 9010101229. The reversal of 9010101221 is 1221010109.

9010101221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9010101221 - 2¹⁸ = 9009839077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9010101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9010101229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6034151 + ... + 6035643.

It is an arithmetic number, because the mean of its divisors is an integer number (616499100).

Almost surely, 2^9010101221 is an apocalyptic number.

It is an amenable number.

9010101221 is a deficient number, since it is larger than the sum of its proper divisors (853884379).

9010101221 is a wasteful number, since it uses less digits than its factorization.

9010101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3076.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 9010101221 is about 94921.5529845567. The cubic root of 9010101221 is about 2080.8617315900.

The spelling of 9010101221 in words is "nine billion, ten million, one hundred one thousand, two hundred twenty-one".