111012020210121 has 4 divisors (see below), whose sum is σ = 148016026946832. Its totient is φ = 74008013473412.

The previous prime is 111012020210099. The next prime is 111012020210141. The reversal of 111012020210121 is 121012020210111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111012020210121 - 2⁶ = 111012020210057 is a prime.

It is a super-2 number, since 2×111012020210121² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111012020210121.

It is not an unprimeable number, because it can be changed into a prime (111012020210141) 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, 18502003368351 + ... + 18502003368356.

It is an arithmetic number, because the mean of its divisors is an integer number (37004006736708).

Almost surely, 2^{111012020210121} is an apocalyptic number.

It is an amenable number.

111012020210121 is a deficient number, since it is larger than the sum of its proper divisors (37004006736711).

111012020210121 is an equidigital number, since it uses as much as digits as its factorization.

111012020210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37004006736710.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111012020210121 its reverse (121012020210111), we get a palindrome (232024040420232).

The spelling of 111012020210121 in words is "one hundred eleven trillion, twelve billion, twenty million, two hundred ten thousand, one hundred twenty-one".