111210002021021 has 4 divisors (see below), whose sum is σ = 112311091150044. Its totient is φ = 110108912892000.

The previous prime is 111210002021017. The next prime is 111210002021059. The reversal of 111210002021021 is 120120200012111.

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 53377475268121 + 57832526752900 = 7305989^2 + 7604770^2 .

It is a cyclic number.

It is not a de Polignac number, because 111210002021021 - 2² = 111210002021017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111210002020987 and 111210002021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111210002021081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550544564360 + ... + 550544564561.

It is an arithmetic number, because the mean of its divisors is an integer number (28077772787511).

Almost surely, 2^{111210002021021} is an apocalyptic number.

It is an amenable number.

111210002021021 is a deficient number, since it is larger than the sum of its proper divisors (1101089129023).

111210002021021 is a wasteful number, since it uses less digits than its factorization.

111210002021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101089129022.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111210002021021 its reverse (120120200012111), we get a palindrome (231330202033132).

The spelling of 111210002021021 in words is "one hundred eleven trillion, two hundred ten billion, two million, twenty-one thousand, twenty-one".