1220183667781 has 16 divisors (see below), whose sum is σ = 1390968754560. Its totient is φ = 1062194293440.

The previous prime is 1220183667761. The next prime is 1220183667869. The reversal of 1220183667781 is 1877663810221.

It is a cyclic number.

It is not a de Polignac number, because 1220183667781 - 2¹⁷ = 1220183536709 is a prime.

It is a super-2 number, since 2×1220183667781² (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 (1220183667761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37618225 + ... + 37650646.

It is an arithmetic number, because the mean of its divisors is an integer number (86935547160).

Almost surely, 2^{1220183667781} is an apocalyptic number.

It is an amenable number.

1220183667781 is a deficient number, since it is larger than the sum of its proper divisors (170785086779).

1220183667781 is a wasteful number, since it uses less digits than its factorization.

1220183667781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75268956.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 1220183667781 in words is "one trillion, two hundred twenty billion, one hundred eighty-three million, six hundred sixty-seven thousand, seven hundred eighty-one".