21111123203010 has 96 divisors (see below), whose sum is σ = 57626778837888. Its totient is φ = 5351830133760.

The previous prime is 21111123202997. The next prime is 21111123203041. The reversal of 21111123203010 is 1030232111112.

21111123203010 is a `hidden beast` number, since 21 + 1 + 11 + 12 + 320 + 301 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30946671 + ... + 31621490.

It is an arithmetic number, because the mean of its divisors is an integer number (600278946228).

Almost surely, 2^{21111123203010} is an apocalyptic number.

21111123203010 is an abundant number, since it is smaller than the sum of its proper divisors (36515655634878).

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

21111123203010 is a wasteful number, since it uses less digits than its factorization.

21111123203010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62568360 (or 62568357 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21111123203010 its reverse (1030232111112), we get a palindrome (22141355314122).

The spelling of 21111123203010 in words is "twenty-one trillion, one hundred eleven billion, one hundred twenty-three million, two hundred three thousand, ten".