21143103210 has 48 divisors (see below), whose sum is σ = 55084142880. Its totient is φ = 5626666080.

The previous prime is 21143103203. The next prime is 21143103263. The reversal of 21143103210 is 1230134112.

21143103210 is a `hidden beast` number, since 21 + 1 + 431 + 0 + 3 + 210 = 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 23 ways as a sum of consecutive naturals, for example, 195040 + ... + 283419.

It is an arithmetic number, because the mean of its divisors is an integer number (1147586310).

Almost surely, 2^21143103210 is an apocalyptic number.

21143103210 is an abundant number, since it is smaller than the sum of its proper divisors (33941039670).

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

21143103210 is a wasteful number, since it uses less digits than its factorization.

21143103210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478963 (or 478960 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21143103210 its reverse (1230134112), we get a palindrome (22373237322).

The spelling of 21143103210 in words is "twenty-one billion, one hundred forty-three million, one hundred three thousand, two hundred ten".