21031314240142 has 16 divisors (see below), whose sum is σ = 32426641476720. Its totient is φ = 10225945405312.

The previous prime is 21031314240091. The next prime is 21031314240193. The reversal of 21031314240142 is 24104241313012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21031314240091) and next prime (21031314240193).

It is a self number, because there is not a number n which added to its sum of digits gives 21031314240142.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 877902292 + ... + 877926247.

It is an arithmetic number, because the mean of its divisors is an integer number (2026665092295).

Almost surely, 2^{21031314240142} is an apocalyptic number.

21031314240142 is a deficient number, since it is larger than the sum of its proper divisors (11395327236578).

21031314240142 is a wasteful number, since it uses less digits than its factorization.

21031314240142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755828707.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21031314240142 its reverse (24104241313012), we get a palindrome (45135555553154).

The spelling of 21031314240142 in words is "twenty-one trillion, thirty-one billion, three hundred fourteen million, two hundred forty thousand, one hundred forty-two".