1241011221 has 4 divisors (see below), whose sum is σ = 1654681632. Its totient is φ = 827340812.

The previous prime is 1241011217. The next prime is 1241011229. The reversal of 1241011221 is 1221101421.

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 an emirpimes, since its reverse is a distinct semiprime: 1221101421 = 3 ⋅407033807.

It is a cyclic number.

It is not a de Polignac number, because 1241011221 - 2² = 1241011217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1241011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241011229) 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, 206835201 + ... + 206835206.

It is an arithmetic number, because the mean of its divisors is an integer number (413670408).

Almost surely, 2^1241011221 is an apocalyptic number.

It is an amenable number.

1241011221 is a deficient number, since it is larger than the sum of its proper divisors (413670411).

1241011221 is an equidigital number, since it uses as much as digits as its factorization.

1241011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413670410.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1241011221 is about 35227.9891705445. The cubic root of 1241011221 is about 1074.6290325543.

Adding to 1241011221 its reverse (1221101421), we get a palindrome (2462112642).

The spelling of 1241011221 in words is "one billion, two hundred forty-one million, eleven thousand, two hundred twenty-one".