21100120124241 has 16 divisors (see below), whose sum is σ = 28831935138048. Its totient is φ = 13717817808000.

The previous prime is 21100120124191. The next prime is 21100120124249. The reversal of 21100120124241 is 14242102100112.

It is not a de Polignac number, because 21100120124241 - 2⁷ = 21100120124113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100120124249) 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, 36194386 + ... + 36772731.

It is an arithmetic number, because the mean of its divisors is an integer number (1801995946128).

Almost surely, 2^{21100120124241} is an apocalyptic number.

It is an amenable number.

21100120124241 is a deficient number, since it is larger than the sum of its proper divisors (7731815013807).

21100120124241 is a wasteful number, since it uses less digits than its factorization.

21100120124241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72969512.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21100120124241 its reverse (14242102100112), we get a palindrome (35342222224353).

The spelling of 21100120124241 in words is "twenty-one trillion, one hundred billion, one hundred twenty million, one hundred twenty-four thousand, two hundred forty-one".