21513051000142 has 16 divisors (see below), whose sum is σ = 34758434874240. Its totient is φ = 9927219530592.

The previous prime is 21513051000083. The next prime is 21513051000169. The reversal of 21513051000142 is 24100015031512.

It is a super-2 number, since 2×21513051000142² (a number of 27 digits) contains 22 as substring.

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, 78232233 + ... + 78506740.

It is an arithmetic number, because the mean of its divisors is an integer number (2172402179640).

Almost surely, 2^{21513051000142} is an apocalyptic number.

21513051000142 is a deficient number, since it is larger than the sum of its proper divisors (13245383874098).

21513051000142 is a wasteful number, since it uses less digits than its factorization.

21513051000142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156744267.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 21513051000142 its reverse (24100015031512), we get a palindrome (45613066031654).

The spelling of 21513051000142 in words is "twenty-one trillion, five hundred thirteen billion, fifty-one million, one hundred forty-two", and thus it is an aban number.