1220121200011 has 8 divisors (see below), whose sum is σ = 1394560047584. Its totient is φ = 1045716307200.

The previous prime is 1220121199963. The next prime is 1220121200033. The reversal of 1220121200011 is 1100021210221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220121200011 - 2¹⁷ = 1220121068939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220121199964 and 1220121200000.

It is not an unprimeable number, because it can be changed into a prime (1220121260011) 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, 8411640 + ... + 8555461.

It is an arithmetic number, because the mean of its divisors is an integer number (174320005948).

Almost surely, 2^{1220121200011} is an apocalyptic number.

1220121200011 is a deficient number, since it is larger than the sum of its proper divisors (174438847573).

1220121200011 is a wasteful number, since it uses less digits than its factorization.

1220121200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16977381.

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

Adding to 1220121200011 its reverse (1100021210221), we get a palindrome (2320142410232).

The spelling of 1220121200011 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, two hundred thousand, eleven".