1107021221 has 4 divisors (see below), whose sum is σ = 1130574912. Its totient is φ = 1083467532.

The previous prime is 1107021199. The next prime is 1107021259. The reversal of 1107021221 is 1221207011.

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 1107021221 - 2¹⁰ = 1107020197 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 1107021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1107021121) 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, 11776775 + ... + 11776868.

It is an arithmetic number, because the mean of its divisors is an integer number (282643728).

Almost surely, 2^1107021221 is an apocalyptic number.

It is an amenable number.

1107021221 is a deficient number, since it is larger than the sum of its proper divisors (23553691).

1107021221 is an equidigital number, since it uses as much as digits as its factorization.

1107021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23553690.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 1107021221 is about 33271.9284232219. The cubic root of 1107021221 is about 1034.4717822458.

Adding to 1107021221 its reverse (1221207011), we get a palindrome (2328228232).

The spelling of 1107021221 in words is "one billion, one hundred seven million, twenty-one thousand, two hundred twenty-one".