1061660222221 has 8 divisors (see below), whose sum is σ = 1062272318400. Its totient is φ = 1061048244960.

The previous prime is 1061660222213. The next prime is 1061660222269. The reversal of 1061660222221 is 1222220661601.

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 1061660222221 - 2³ = 1061660222213 is a prime.

It is a super-2 number, since 2×1061660222221² (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 (1061660220221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22618545 + ... + 22665433.

It is an arithmetic number, because the mean of its divisors is an integer number (132784039800).

Almost surely, 2^{1061660222221} is an apocalyptic number.

It is an amenable number.

1061660222221 is a deficient number, since it is larger than the sum of its proper divisors (612096179).

1061660222221 is a wasteful number, since it uses less digits than its factorization.

1061660222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59459.

The product of its (nonzero) digits is 6912, while the sum is 31.

Adding to 1061660222221 its reverse (1222220661601), we get a palindrome (2283880883822).

The spelling of 1061660222221 in words is "one trillion, sixty-one billion, six hundred sixty million, two hundred twenty-two thousand, two hundred twenty-one".