1011411221 has 4 divisors (see below), whose sum is σ = 1046287500. Its totient is φ = 976534944.

The previous prime is 1011411197. The next prime is 1011411227. The reversal of 1011411221 is 1221141101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 182547121 + 828864100 = 13511^2 + 28790^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011411221 - 2¹⁴ = 1011394837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1011411196 and 1011411205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011411227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17438096 + ... + 17438153.

It is an arithmetic number, because the mean of its divisors is an integer number (261571875).

Almost surely, 2^1011411221 is an apocalyptic number.

It is an amenable number.

1011411221 is a deficient number, since it is larger than the sum of its proper divisors (34876279).

1011411221 is an equidigital number, since it uses as much as digits as its factorization.

1011411221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34876278.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 1011411221 is about 31802.6920401402. The cubic root of 1011411221 is about 1003.7893629245.

Adding to 1011411221 its reverse (1221141101), we get a palindrome (2232552322).

The spelling of 1011411221 in words is "one billion, eleven million, four hundred eleven thousand, two hundred twenty-one".