21111122030 has 16 divisors (see below), whose sum is σ = 38014423200. Its totient is φ = 8441248032.

The previous prime is 21111122003. The next prime is 21111122093. The reversal of 21111122030 is 3022111112.

It is a junction number, because it is equal to n+sod(n) for n = 21111121996 and 21111122014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372305 + ... + 425244.

It is an arithmetic number, because the mean of its divisors is an integer number (2375901450).

Almost surely, 2^21111122030 is an apocalyptic number.

21111122030 is a deficient number, since it is larger than the sum of its proper divisors (16903301170).

21111122030 is a wasteful number, since it uses less digits than its factorization.

21111122030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800203.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21111122030 its reverse (3022111112), we get a palindrome (24133233142).

The spelling of 21111122030 in words is "twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, thirty".