1221200133130 has 16 divisors (see below), whose sum is σ = 2198642268744. Its totient is φ = 488372935680.

The previous prime is 1221200133121. The next prime is 1221200133137. The reversal of 1221200133130 is 313310021221.

It can be written as a sum of positive squares in 4 ways, for example, as 1000994247009 + 220205886121 = 1000497^2 + 469261^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1221200133098 and 1221200133107.

It is not an unprimeable number, because it can be changed into a prime (1221200133137) 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, 13341807 + ... + 13433026.

Almost surely, 2^{1221200133130} is an apocalyptic number.

1221200133130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221200133130 is a deficient number, since it is larger than the sum of its proper divisors (977442135614).

1221200133130 is a wasteful number, since it uses less digits than its factorization.

1221200133130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26779401.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1221200133130 its reverse (313310021221), we get a palindrome (1534510154351).

The spelling of 1221200133130 in words is "one trillion, two hundred twenty-one billion, two hundred million, one hundred thirty-three thousand, one hundred thirty".