21124034111100 has 72 divisors (see below), whose sum is σ = 63776214311040. Its totient is φ = 5388159423680.

The previous prime is 21124034111021. The next prime is 21124034111143. The reversal of 21124034111100 is 111143042112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1530720210 + ... + 1530734009.

It is an arithmetic number, because the mean of its divisors is an integer number (885780754320).

Almost surely, 2^{21124034111100} is an apocalyptic number.

21124034111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21124034111100 is an abundant number, since it is smaller than the sum of its proper divisors (42652180199940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21124034111100 is a wasteful number, since it uses less digits than its factorization.

21124034111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061454259 (or 3061454252 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 21124034111100 its reverse (111143042112), we get a palindrome (21235177153212).

The spelling of 21124034111100 in words is "twenty-one trillion, one hundred twenty-four billion, thirty-four million, one hundred eleven thousand, one hundred".