111020022012121 has 4 divisors (see below), whose sum is σ = 111098815499700. Its totient is φ = 110941228524544.

The previous prime is 111020022012083. The next prime is 111020022012139. The reversal of 111020022012121 is 121210220020111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3400560971721 + 107619461040400 = 1844061^2 + 10373980^2 .

It is a cyclic number.

It is not a de Polignac number, because 111020022012121 - 2⁴³ = 102223928989913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111020022012095 and 111020022012104.

It is not an unprimeable number, because it can be changed into a prime (111020022016121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39396741676 + ... + 39396744493.

It is an arithmetic number, because the mean of its divisors is an integer number (27774703874925).

Almost surely, 2^{111020022012121} is an apocalyptic number.

It is an amenable number.

111020022012121 is a deficient number, since it is larger than the sum of its proper divisors (78793487579).

111020022012121 is an equidigital number, since it uses as much as digits as its factorization.

111020022012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78793487578.

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

Adding to 111020022012121 its reverse (121210220020111), we get a palindrome (232230242032232).

The spelling of 111020022012121 in words is "one hundred eleven trillion, twenty billion, twenty-two million, twelve thousand, one hundred twenty-one".