1120121210221 has 8 divisors (see below), whose sum is σ = 1229044463640. Its totient is φ = 1014449397312.

The previous prime is 1120121210171. The next prime is 1120121210239. The reversal of 1120121210221 is 1220121210211.

It can be written as a sum of positive squares in 4 ways, for example, as 121598664100 + 998522546121 = 348710^2 + 999261^2 .

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

It is not a de Polignac number, because 1120121210221 - 2³⁵ = 1085761471853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1120121210195 and 1120121210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120121210821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812859406 + ... + 812860783.

It is an arithmetic number, because the mean of its divisors is an integer number (153630557955).

Almost surely, 2^{1120121210221} is an apocalyptic number.

It is an amenable number.

1120121210221 is a deficient number, since it is larger than the sum of its proper divisors (108923253419).

1120121210221 is a wasteful number, since it uses less digits than its factorization.

1120121210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625720255.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1120121210221 its reverse (1220121210211), we get a palindrome (2340242420432).

The spelling of 1120121210221 in words is "one trillion, one hundred twenty billion, one hundred twenty-one million, two hundred ten thousand, two hundred twenty-one".