1011000121221 has 8 divisors (see below), whose sum is σ = 1354984619200. Its totient is φ = 670507852032.

The previous prime is 1011000121177. The next prime is 1011000121277. The reversal of 1011000121221 is 1221210001101.

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

It is not a de Polignac number, because 1011000121221 - 2¹³ = 1011000113029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1011000121197 and 1011000121206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011000121721) 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, 873056521 + ... + 873057678.

It is an arithmetic number, because the mean of its divisors is an integer number (169373077400).

Almost surely, 2^{1011000121221} is an apocalyptic number.

It is an amenable number.

1011000121221 is a deficient number, since it is larger than the sum of its proper divisors (343984497979).

1011000121221 is a wasteful number, since it uses less digits than its factorization.

1011000121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746114395.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1011000121221 its reverse (1221210001101), we get a palindrome (2232210122322).

The spelling of 1011000121221 in words is "one trillion, eleven billion, one hundred twenty-one thousand, two hundred twenty-one".