21142103313 has 16 divisors (see below), whose sum is σ = 28712503296. Its totient is φ = 13834969680.

The previous prime is 21142103299. The next prime is 21142103321. The reversal of 21142103313 is 31330124112.

It is a de Polignac number, because none of the positive numbers 2^k-21142103313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21142103313.

It is not an unprimeable number, because it can be changed into a prime (21142103513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170281 + ... + 266982.

It is an arithmetic number, because the mean of its divisors is an integer number (1794531456).

Almost surely, 2^21142103313 is an apocalyptic number.

It is an amenable number.

21142103313 is a deficient number, since it is larger than the sum of its proper divisors (7570399983).

21142103313 is a wasteful number, since it uses less digits than its factorization.

21142103313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437564.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21142103313 its reverse (31330124112), we get a palindrome (52472227425).

The spelling of 21142103313 in words is "twenty-one billion, one hundred forty-two million, one hundred three thousand, three hundred thirteen".