1021222221985 has 32 divisors (see below), whose sum is σ = 1405411430400. Its totient is φ = 697829079552.

The previous prime is 1021222221977. The next prime is 1021222221997. The reversal of 1021222221985 is 5891222221201.

It is a cyclic number.

It is not a de Polignac number, because 1021222221985 - 2³ = 1021222221977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38253312 + ... + 38279998.

It is an arithmetic number, because the mean of its divisors is an integer number (43919107200).

Almost surely, 2^{1021222221985} is an apocalyptic number.

It is an amenable number.

1021222221985 is a deficient number, since it is larger than the sum of its proper divisors (384189208415).

1021222221985 is a wasteful number, since it uses less digits than its factorization.

1021222221985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30465.

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 1021222221985 in words is "one trillion, twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, nine hundred eighty-five".