111021002121001 has 16 divisors (see below), whose sum is σ = 129788869328896. Its totient is φ = 93002433034896.

The previous prime is 111021002120999. The next prime is 111021002121059. The reversal of 111021002121001 is 100121200120111.

It is a happy number.

It is not a de Polignac number, because 111021002121001 - 2¹ = 111021002120999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111021002121061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 931903251 + ... + 932022376.

It is an arithmetic number, because the mean of its divisors is an integer number (8111804333056).

Almost surely, 2^{111021002121001} is an apocalyptic number.

It is an amenable number.

111021002121001 is a deficient number, since it is larger than the sum of its proper divisors (18767867207895).

111021002121001 is a wasteful number, since it uses less digits than its factorization.

111021002121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863925828.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111021002121001 its reverse (100121200120111), we get a palindrome (211142202241112).

The spelling of 111021002121001 in words is "one hundred eleven trillion, twenty-one billion, two million, one hundred twenty-one thousand, one".