1220681061 has 24 divisors (see below), whose sum is σ = 1810748160. Its totient is φ = 792136800.

The previous prime is 1220681041. The next prime is 1220681089. The reversal of 1220681061 is 1601860221.

It is not a de Polignac number, because 1220681061 - 2⁶ = 1220680997 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220681041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38391 + ... + 62571.

It is an arithmetic number, because the mean of its divisors is an integer number (75447840).

Almost surely, 2^1220681061 is an apocalyptic number.

It is an amenable number.

1220681061 is a deficient number, since it is larger than the sum of its proper divisors (590067099).

1220681061 is a wasteful number, since it uses less digits than its factorization.

1220681061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24337 (or 24334 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1220681061 is about 34938.2463927427. The cubic root of 1220681061 is about 1068.7285275670.

The spelling of 1220681061 in words is "one billion, two hundred twenty million, six hundred eighty-one thousand, sixty-one".