21023203130142 has 16 divisors (see below), whose sum is σ = 42047231780352. Its totient is φ = 7007596790040.

The previous prime is 21023203130071. The next prime is 21023203130183. The reversal of 21023203130142 is 24103130232012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34065358 + ... + 34677009.

It is an arithmetic number, because the mean of its divisors is an integer number (2627951986272).

Almost surely, 2^{21023203130142} is an apocalyptic number.

21023203130142 is an abundant number, since it is smaller than the sum of its proper divisors (21024028650210).

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

21023203130142 is a wasteful number, since it uses less digits than its factorization.

21023203130142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68793343.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21023203130142 its reverse (24103130232012), we get a palindrome (45126333362154).

The spelling of 21023203130142 in words is "twenty-one trillion, twenty-three billion, two hundred three million, one hundred thirty thousand, one hundred forty-two".