1221101104 has 40 divisors (see below), whose sum is σ = 2401195520. Its totient is φ = 601473600.

The previous prime is 1221101083. The next prime is 1221101107. The reversal of 1221101104 is 4011011221.

It is not an unprimeable number, because it can be changed into a prime (1221101107) 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, 796819 + ... + 798349.

It is an arithmetic number, because the mean of its divisors is an integer number (60029888).

Almost surely, 2^1221101104 is an apocalyptic number.

It is an amenable number.

1221101104 is a deficient number, since it is larger than the sum of its proper divisors (1180094416).

1221101104 is a wasteful number, since it uses less digits than its factorization.

1221101104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249 (or 2243 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1221101104 is about 34944.2570961238. The cubic root of 1221101104 is about 1068.8510986109.

Adding to 1221101104 its reverse (4011011221), we get a palindrome (5232112325).

The spelling of 1221101104 in words is "one billion, two hundred twenty-one million, one hundred one thousand, one hundred four".