1221230130011 has 4 divisors (see below), whose sum is σ = 1221330564024. Its totient is φ = 1221129696000.

The previous prime is 1221230129983. The next prime is 1221230130031. The reversal of 1221230130011 is 1100310321221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1221230130011 - 2¹⁴ = 1221230113627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221230130031) 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, 50198765 + ... + 50223086.

It is an arithmetic number, because the mean of its divisors is an integer number (305332641006).

Almost surely, 2^{1221230130011} is an apocalyptic number.

1221230130011 is a deficient number, since it is larger than the sum of its proper divisors (100434013).

1221230130011 is a wasteful number, since it uses less digits than its factorization.

1221230130011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100434012.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1221230130011 its reverse (1100310321221), we get a palindrome (2321540451232).

The spelling of 1221230130011 in words is "one trillion, two hundred twenty-one billion, two hundred thirty million, one hundred thirty thousand, eleven".