111020021002121 has 24 divisors (see below), whose sum is σ = 149173687514016. Its totient is φ = 81420336251520.

The previous prime is 111020021002103. The next prime is 111020021002133. The reversal of 111020021002121 is 121200120020111.

It is a de Polignac number, because none of the positive numbers 2^k-111020021002121 is a prime.

It is a super-2 number, since 2×111020021002121² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111020021002096 and 111020021002105.

It is not an unprimeable number, because it can be changed into a prime (111020021002151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6058051571 + ... + 6058069896.

It is an arithmetic number, because the mean of its divisors is an integer number (6215570313084).

Almost surely, 2^{111020021002121} is an apocalyptic number.

111020021002121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111020021002121 is a deficient number, since it is larger than the sum of its proper divisors (38153666511895).

111020021002121 is a wasteful number, since it uses less digits than its factorization.

111020021002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12116121509 (or 12116121502 counting only the distinct ones).

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

Adding to 111020021002121 its reverse (121200120020111), we get a palindrome (232220141022232).

The spelling of 111020021002121 in words is "one hundred eleven trillion, twenty billion, twenty-one million, two thousand, one hundred twenty-one".