21124221141 has 8 divisors (see below), whose sum is σ = 28275223104. Its totient is φ = 14028016640.

The previous prime is 21124221137. The next prime is 21124221143. The reversal of 21124221141 is 14112242112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21124221141 - 2² = 21124221137 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124221143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13698465 + ... + 13700006.

It is an arithmetic number, because the mean of its divisors is an integer number (3534402888).

Almost surely, 2^21124221141 is an apocalyptic number.

It is an amenable number.

21124221141 is a deficient number, since it is larger than the sum of its proper divisors (7151001963).

21124221141 is a wasteful number, since it uses less digits than its factorization.

21124221141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27398731.

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

Adding to 21124221141 its reverse (14112242112), we get a palindrome (35236463253).

The spelling of 21124221141 in words is "twenty-one billion, one hundred twenty-four million, two hundred twenty-one thousand, one hundred forty-one".