1011210221 has 4 divisors (see below), whose sum is σ = 1155668832. Its totient is φ = 866751612.

The previous prime is 1011210197. The next prime is 1011210227. The reversal of 1011210221 is 1220121101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1011210221 - 2¹⁰ = 1011209197 is a prime.

It is a super-2 number, since 2×1011210221² = 2045092222109737682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011210227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72229295 + ... + 72229308.

It is an arithmetic number, because the mean of its divisors is an integer number (288917208).

Almost surely, 2^1011210221 is an apocalyptic number.

It is an amenable number.

1011210221 is a deficient number, since it is larger than the sum of its proper divisors (144458611).

1011210221 is an equidigital number, since it uses as much as digits as its factorization.

1011210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144458610.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1011210221 is about 31799.5317732824. The cubic root of 1011210221 is about 1003.7228634220.

Adding to 1011210221 its reverse (1220121101), we get a palindrome (2231331322).

The spelling of 1011210221 in words is "one billion, eleven million, two hundred ten thousand, two hundred twenty-one".