21121033111033 has 16 divisors (see below), whose sum is σ = 21865426845696. Its totient is φ = 20380611283920.

The previous prime is 21121033111019. The next prime is 21121033111147. The reversal of 21121033111033 is 33011133012112.

It is a cyclic number.

It is not a de Polignac number, because 21121033111033 - 2³³ = 21112443176441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21121033110995 and 21121033111013.

It is not an unprimeable number, because it can be changed into a prime (21121033111933) 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, 42292716 + ... + 42789202.

It is an arithmetic number, because the mean of its divisors is an integer number (1366589177856).

Almost surely, 2^{21121033111033} is an apocalyptic number.

It is an amenable number.

21121033111033 is a deficient number, since it is larger than the sum of its proper divisors (744393734663).

21121033111033 is a wasteful number, since it uses less digits than its factorization.

21121033111033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500484.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 21121033111033 its reverse (33011133012112), we get a palindrome (54132166123145).

The spelling of 21121033111033 in words is "twenty-one trillion, one hundred twenty-one billion, thirty-three million, one hundred eleven thousand, thirty-three".