21211155141 has 16 divisors (see below), whose sum is σ = 31847835648. Its totient is φ = 12440559600.

The previous prime is 21211155139. The next prime is 21211155157. The reversal of 21211155141 is 14155111212.

It is not a de Polignac number, because 21211155141 - 2¹ = 21211155139 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211155181) 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, 10366111 + ... + 10368156.

It is an arithmetic number, because the mean of its divisors is an integer number (1990489728).

Almost surely, 2^21211155141 is an apocalyptic number.

It is an amenable number.

21211155141 is a deficient number, since it is larger than the sum of its proper divisors (10636680507).

21211155141 is a wasteful number, since it uses less digits than its factorization.

21211155141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20734312.

The product of its digits is 400, while the sum is 24.

Adding to 21211155141 its reverse (14155111212), we get a palindrome (35366266353).

The spelling of 21211155141 in words is "twenty-one billion, two hundred eleven million, one hundred fifty-five thousand, one hundred forty-one".