1221140411221 has 16 divisors (see below), whose sum is σ = 1298365148160. Its totient is φ = 1145215108800.

The previous prime is 1221140411207. The next prime is 1221140411269.

1221140411221 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1221140411221 - 2⁷ = 1221140411093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221140411192 and 1221140411201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221140411321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11532300 + ... + 11637706.

It is an arithmetic number, because the mean of its divisors is an integer number (81147821760).

Almost surely, 2^{1221140411221} is an apocalyptic number.

It is an amenable number.

1221140411221 is a deficient number, since it is larger than the sum of its proper divisors (77224736939).

1221140411221 is a wasteful number, since it uses less digits than its factorization.

1221140411221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111564.

The product of its (nonzero) digits is 256, while the sum is 22.

It can be divided in two parts, 1221140 and 411221, that added together give a palindrome (1632361).

The spelling of 1221140411221 in words is "one trillion, two hundred twenty-one billion, one hundred forty million, four hundred eleven thousand, two hundred twenty-one".