1016671221 has 12 divisors (see below), whose sum is σ = 1468927200. Its totient is φ = 677595240.

The previous prime is 1016671211. The next prime is 1016671289. The reversal of 1016671221 is 1221766101.

It is a happy number.

It is not a de Polignac number, because 1016671221 - 2¹⁷ = 1016540149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1016671211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24730 + ... + 51428.

It is an arithmetic number, because the mean of its divisors is an integer number (122410600).

Almost surely, 2^1016671221 is an apocalyptic number.

It is an amenable number.

1016671221 is a deficient number, since it is larger than the sum of its proper divisors (452255979).

1016671221 is a wasteful number, since it uses less digits than its factorization.

1016671221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30936 (or 30933 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 1016671221 is about 31885.2822004134. The cubic root of 1016671221 is about 1005.5264754724.

The spelling of 1016671221 in words is "one billion, sixteen million, six hundred seventy-one thousand, two hundred twenty-one".