21111133121332 has 12 divisors (see below), whose sum is σ = 36944558584416. Its totient is φ = 10555544954360.

The previous prime is 21111133121329. The next prime is 21111133121359. The reversal of 21111133121332 is 23312133111112.

It is a junction number, because it is equal to n+sod(n) for n = 21111133121297 and 21111133121306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3093568 + ... + 7196695.

It is an arithmetic number, because the mean of its divisors is an integer number (3078713215368).

Almost surely, 2^{21111133121332} is an apocalyptic number.

It is an amenable number.

21111133121332 is a deficient number, since it is larger than the sum of its proper divisors (15833425463084).

21111133121332 is a wasteful number, since it uses less digits than its factorization.

21111133121332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10803158 (or 10803156 counting only the distinct ones).

The product of its digits is 648, while the sum is 25.

Adding to 21111133121332 its reverse (23312133111112), we get a palindrome (44423266232444).

The spelling of 21111133121332 in words is "twenty-one trillion, one hundred eleven billion, one hundred thirty-three million, one hundred twenty-one thousand, three hundred thirty-two".