21111153141 has 8 divisors (see below), whose sum is σ = 30313450720. Its totient is φ = 12991478832.

The previous prime is 21111153139. The next prime is 21111153149. The reversal of 21111153141 is 14135111112.

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

It is not a de Polignac number, because 21111153141 - 2¹ = 21111153139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111153149) 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, 270655771 + ... + 270655848.

It is an arithmetic number, because the mean of its divisors is an integer number (3789181340).

Almost surely, 2^21111153141 is an apocalyptic number.

It is an amenable number.

21111153141 is a deficient number, since it is larger than the sum of its proper divisors (9202297579).

21111153141 is a wasteful number, since it uses less digits than its factorization.

21111153141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541311635.

The product of its digits is 120, while the sum is 21.

Adding to 21111153141 its reverse (14135111112), we get a palindrome (35246264253).

The spelling of 21111153141 in words is "twenty-one billion, one hundred eleven million, one hundred fifty-three thousand, one hundred forty-one".