1221103204130 has 16 divisors (see below), whose sum is σ = 2198019620160. Its totient is φ = 488433758832.

The previous prime is 1221103204081. The next prime is 1221103204183. The reversal of 1221103204130 is 314023011221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233294 + ... + 1580073.

It is an arithmetic number, because the mean of its divisors is an integer number (137376226260).

Almost surely, 2^{1221103204130} is an apocalyptic number.

1221103204130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221103204130 is a deficient number, since it is larger than the sum of its proper divisors (976916416030).

1221103204130 is a wasteful number, since it uses less digits than its factorization.

1221103204130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880713.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1221103204130 its reverse (314023011221), we get a palindrome (1535126215351).

The spelling of 1221103204130 in words is "one trillion, two hundred twenty-one billion, one hundred three million, two hundred four thousand, one hundred thirty".