1011354221 has 4 divisors (see below), whose sum is σ = 1011418944. Its totient is φ = 1011289500.

The previous prime is 1011354209. The next prime is 1011354233. The reversal of 1011354221 is 1224531101.

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, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (1011354209) and next prime (1011354233).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011354221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011354193 and 1011354202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011354241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7196 + ... + 45546.

It is an arithmetic number, because the mean of its divisors is an integer number (252854736).

Almost surely, 2^1011354221 is an apocalyptic number.

It is an amenable number.

1011354221 is a deficient number, since it is larger than the sum of its proper divisors (64723).

1011354221 is an equidigital number, since it uses as much as digits as its factorization.

1011354221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64722.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1011354221 is about 31801.7958769627. The cubic root of 1011354221 is about 1003.7705057516.

Adding to 1011354221 its reverse (1224531101), we get a palindrome (2235885322).

The spelling of 1011354221 in words is "one billion, eleven million, three hundred fifty-four thousand, two hundred twenty-one".