21024551141 has 12 divisors (see below), whose sum is σ = 23129257536. Its totient is φ = 19096995720.

The previous prime is 21024551123. The next prime is 21024551179. The reversal of 21024551141 is 14115542012.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-21024551141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21024551141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21024551101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70436 + ... + 216818.

It is an arithmetic number, because the mean of its divisors is an integer number (1927438128).

Almost surely, 2^21024551141 is an apocalyptic number.

It is an amenable number.

21024551141 is a deficient number, since it is larger than the sum of its proper divisors (2104706395).

21024551141 is a wasteful number, since it uses less digits than its factorization.

21024551141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147592 (or 147581 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The spelling of 21024551141 in words is "twenty-one billion, twenty-four million, five hundred fifty-one thousand, one hundred forty-one".