21541123235010 has 32 divisors (see below), whose sum is σ = 51709091999040. Its totient is φ = 5743144392128.

The previous prime is 21541123234957. The next prime is 21541123235069. The reversal of 21541123235010 is 1053232114512.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72044400 + ... + 72342779.

It is an arithmetic number, because the mean of its divisors is an integer number (1615909124970).

Almost surely, 2^{21541123235010} is an apocalyptic number.

21541123235010 is an abundant number, since it is smaller than the sum of its proper divisors (30167968764030).

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

21541123235010 is a wasteful number, since it uses less digits than its factorization.

21541123235010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144392162.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 21541123235010 its reverse (1053232114512), we get a palindrome (22594355349522).

The spelling of 21541123235010 in words is "twenty-one trillion, five hundred forty-one billion, one hundred twenty-three million, two hundred thirty-five thousand, ten".