21512540502141 has 16 divisors (see below), whose sum is σ = 30890577600960. Its totient is φ = 13238153953920.

The previous prime is 21512540502139. The next prime is 21512540502151. The reversal of 21512540502141 is 14120504521512.

It is not a de Polignac number, because 21512540502141 - 2¹ = 21512540502139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21512540502151) 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, 5350075 + ... + 8464536.

It is an arithmetic number, because the mean of its divisors is an integer number (1930661100060).

Almost surely, 2^{21512540502141} is an apocalyptic number.

It is an amenable number.

21512540502141 is a deficient number, since it is larger than the sum of its proper divisors (9378037098819).

21512540502141 is a wasteful number, since it uses less digits than its factorization.

21512540502141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13854556.

The product of its (nonzero) digits is 16000, while the sum is 33.

The spelling of 21512540502141 in words is "twenty-one trillion, five hundred twelve billion, five hundred forty million, five hundred two thousand, one hundred forty-one".