21242143402110 has 64 divisors (see below), whose sum is σ = 56654753218560. Its totient is φ = 5663667826080.

The previous prime is 21242143402087. The next prime is 21242143402153. The reversal of 21242143402110 is 1120434124212.

21242143402110 is a `hidden beast` number, since 2 + 1 + 2 + 4 + 2 + 143 + 402 + 110 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4579722 + ... + 7966061.

It is an arithmetic number, because the mean of its divisors is an integer number (885230519040).

Almost surely, 2^{21242143402110} is an apocalyptic number.

21242143402110 is an abundant number, since it is smaller than the sum of its proper divisors (35412609816450).

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

21242143402110 is a wasteful number, since it uses less digits than its factorization.

21242143402110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12552070 (or 12552064 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 21242143402110 its reverse (1120434124212), we get a palindrome (22362577526322).

The spelling of 21242143402110 in words is "twenty-one trillion, two hundred forty-two billion, one hundred forty-three million, four hundred two thousand, one hundred ten".