1121020210221 has 16 divisors (see below), whose sum is σ = 1536191652864. Its totient is φ = 726750917424.

The previous prime is 1121020210201. The next prime is 1121020210223. The reversal of 1121020210221 is 1220120201211.

It is not a de Polignac number, because 1121020210221 - 2⁶ = 1121020210157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121020210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121020210223) 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, 19111861 + ... + 19170426.

It is an arithmetic number, because the mean of its divisors is an integer number (96011978304).

Almost surely, 2^{1121020210221} is an apocalyptic number.

It is an amenable number.

1121020210221 is a deficient number, since it is larger than the sum of its proper divisors (415171442643).

1121020210221 is a wasteful number, since it uses less digits than its factorization.

1121020210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38282560.

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

Adding to 1121020210221 its reverse (1220120201211), we get a palindrome (2341140411432).

The spelling of 1121020210221 in words is "one trillion, one hundred twenty-one billion, twenty million, two hundred ten thousand, two hundred twenty-one".