1221110564141 has 16 divisors (see below), whose sum is σ = 1329993000000. Its totient is φ = 1114406201088.

The previous prime is 1221110564117. The next prime is 1221110564161. The reversal of 1221110564141 is 1414650111221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221110564141 is a prime.

It is a super-2 number, since 2×1221110564141² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221110564161) 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, 185516 + ... + 1573733.

It is an arithmetic number, because the mean of its divisors is an integer number (83124562500).

Almost surely, 2^{1221110564141} is an apocalyptic number.

It is an amenable number.

1221110564141 is a deficient number, since it is larger than the sum of its proper divisors (108882435859).

1221110564141 is a wasteful number, since it uses less digits than its factorization.

1221110564141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759868.

The product of its (nonzero) digits is 1920, while the sum is 29.

Adding to 1221110564141 its reverse (1414650111221), we get a palindrome (2635760675362).

The spelling of 1221110564141 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, five hundred sixty-four thousand, one hundred forty-one".