1022121100221 has 8 divisors (see below), whose sum is σ = 1467661067040. Its totient is φ = 628997600112.

The previous prime is 1022121100157. The next prime is 1022121100279. The reversal of 1022121100221 is 1220011212201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1022121100221 - 2⁶ = 1022121100157 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1022121100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022121100921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13104116631 + ... + 13104116708.

It is an arithmetic number, because the mean of its divisors is an integer number (183457633380).

Almost surely, 2^{1022121100221} is an apocalyptic number.

It is an amenable number.

1022121100221 is a deficient number, since it is larger than the sum of its proper divisors (445539966819).

1022121100221 is a wasteful number, since it uses less digits than its factorization.

1022121100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26208233355.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1022121100221 its reverse (1220011212201), we get a palindrome (2242132312422).

The spelling of 1022121100221 in words is "one trillion, twenty-two billion, one hundred twenty-one million, one hundred thousand, two hundred twenty-one".