21121044141 has 16 divisors (see below), whose sum is σ = 29883870720. Its totient is φ = 13240209840.

The previous prime is 21121044089. The next prime is 21121044211. The reversal of 21121044141 is 14144012112.

It is not a de Polignac number, because 21121044141 - 2⁷ = 21121044013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121044541) 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, 2590015 + ... + 2598156.

It is an arithmetic number, because the mean of its divisors is an integer number (1867741920).

Almost surely, 2^21121044141 is an apocalyptic number.

It is an amenable number.

21121044141 is a deficient number, since it is larger than the sum of its proper divisors (8762826579).

21121044141 is a wasteful number, since it uses less digits than its factorization.

21121044141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5188256.

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

Adding to 21121044141 its reverse (14144012112), we get a palindrome (35265056253).

The spelling of 21121044141 in words is "twenty-one billion, one hundred twenty-one million, forty-four thousand, one hundred forty-one".