111121101002021 has 16 divisors (see below), whose sum is σ = 121263938224128. Its totient is φ = 100985089129200.

The previous prime is 111121101001831. The next prime is 111121101002039. The reversal of 111121101002021 is 120200101121111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111121101002021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111121101001987 and 111121101002005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121101002521) 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, 421703516 + ... + 421966938.

It is an arithmetic number, because the mean of its divisors is an integer number (7578996139008).

Almost surely, 2^{111121101002021} is an apocalyptic number.

111121101002021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111121101002021 is a deficient number, since it is larger than the sum of its proper divisors (10142837222107).

111121101002021 is a wasteful number, since it uses less digits than its factorization.

111121101002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276232.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111121101002021 its reverse (120200101121111), we get a palindrome (231321202123132).

The spelling of 111121101002021 in words is "one hundred eleven trillion, one hundred twenty-one billion, one hundred one million, two thousand, twenty-one".