1000111021221 has 16 divisors (see below), whose sum is σ = 1439748535680. Its totient is φ = 613870785600.

The previous prime is 1000111021177. The next prime is 1000111021229. The reversal of 1000111021221 is 1221201110001.

1000111021221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1000111021221 - 2⁷ = 1000111021093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000111021197 and 1000111021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000111021229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32946105 + ... + 32976446.

It is an arithmetic number, because the mean of its divisors is an integer number (89984283480).

Almost surely, 2^{1000111021221} is an apocalyptic number.

It is an amenable number.

1000111021221 is a deficient number, since it is larger than the sum of its proper divisors (439637514459).

1000111021221 is a wasteful number, since it uses less digits than its factorization.

1000111021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65922956.

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

Adding to 1000111021221 its reverse (1221201110001), we get a palindrome (2221312131222).

The spelling of 1000111021221 in words is "one trillion, one hundred eleven million, twenty-one thousand, two hundred twenty-one".