21123112122230 has 32 divisors (see below), whose sum is σ = 40627507646880. Its totient is φ = 7879274196480.

The previous prime is 21123112122227. The next prime is 21123112122269. The reversal of 21123112122230 is 3222121132112.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21123112122196 and 21123112122205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 569952116 + ... + 569989175.

It is an arithmetic number, because the mean of its divisors is an integer number (1269609613965).

Almost surely, 2^{21123112122230} is an apocalyptic number.

21123112122230 is a deficient number, since it is larger than the sum of its proper divisors (19504395524650).

21123112122230 is a wasteful number, since it uses less digits than its factorization.

21123112122230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139941424.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21123112122230 its reverse (3222121132112), we get a palindrome (24345233254342).

The spelling of 21123112122230 in words is "twenty-one trillion, one hundred twenty-three billion, one hundred twelve million, one hundred twenty-two thousand, two hundred thirty".