1145221102 has 16 divisors (see below), whose sum is σ = 1768967424. Its totient is φ = 555712000.

The previous prime is 1145221087. The next prime is 1145221109. The reversal of 1145221102 is 2011225411.

It is a self number, because there is not a number n which added to its sum of digits gives 1145221102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145221109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20899 + ... + 52222.

It is an arithmetic number, because the mean of its divisors is an integer number (110560464).

Almost surely, 2^1145221102 is an apocalyptic number.

1145221102 is a deficient number, since it is larger than the sum of its proper divisors (623746322).

1145221102 is a wasteful number, since it uses less digits than its factorization.

1145221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73355.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1145221102 is about 33841.1155548986. The cubic root of 1145221102 is about 1046.2362914538.

Adding to 1145221102 its reverse (2011225411), we get a palindrome (3156446513).

The spelling of 1145221102 in words is "one billion, one hundred forty-five million, two hundred twenty-one thousand, one hundred two".