11111103102021 has 16 divisors (see below), whose sum is σ = 15956546114880. Its totient is φ = 6836684054400.

The previous prime is 11111103102019. The next prime is 11111103102049. The reversal of 11111103102021 is 12020130111111.

It is not a de Polignac number, because 11111103102021 - 2¹ = 11111103102019 is a prime.

It is a super-2 number, since 2×11111103102021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111103102521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18827656 + ... + 19408833.

It is an arithmetic number, because the mean of its divisors is an integer number (997284132180).

Almost surely, 2^{11111103102021} is an apocalyptic number.

It is an amenable number.

11111103102021 is a deficient number, since it is larger than the sum of its proper divisors (4845443012859).

11111103102021 is a wasteful number, since it uses less digits than its factorization.

11111103102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38243956.

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 11111103102021 its reverse (12020130111111), we get a palindrome (23131233213132).

The spelling of 11111103102021 in words is "eleven trillion, one hundred eleven billion, one hundred three million, one hundred two thousand, twenty-one".