21111233103021 has 16 divisors (see below), whose sum is σ = 28187199518400. Its totient is φ = 14054712127488.

The previous prime is 21111233103019. The next prime is 21111233103029. The reversal of 21111233103021 is 12030133211112.

It is not a de Polignac number, because 21111233103021 - 2¹ = 21111233103019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111233103029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92399095 + ... + 92627291.

It is an arithmetic number, because the mean of its divisors is an integer number (1761699969900).

Almost surely, 2^{21111233103021} is an apocalyptic number.

It is an amenable number.

21111233103021 is a deficient number, since it is larger than the sum of its proper divisors (7075966415379).

21111233103021 is a wasteful number, since it uses less digits than its factorization.

21111233103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270668.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21111233103021 its reverse (12030133211112), we get a palindrome (33141366314133).

The spelling of 21111233103021 in words is "twenty-one trillion, one hundred eleven billion, two hundred thirty-three million, one hundred three thousand, twenty-one".