21343215141 has 18 divisors (see below), whose sum is σ = 31855668390. Its totient is φ = 13769810640.

The previous prime is 21343215121. The next prime is 21343215149. The reversal of 21343215141 is 14151234312.

21343215141 is a `hidden beast` number, since 213 + 432 + 1 + 5 + 14 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21318920100 + 24295041 = 146010^2 + 4929^2 .

It is not a de Polignac number, because 21343215141 - 2¹⁴ = 21343198757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343215149) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1225206 + ... + 1242503.

It is an arithmetic number, because the mean of its divisors is an integer number (1769759355).

Almost surely, 2^21343215141 is an apocalyptic number.

It is an amenable number.

21343215141 is a deficient number, since it is larger than the sum of its proper divisors (10512453249).

21343215141 is a wasteful number, since it uses less digits than its factorization.

21343215141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2467777 (or 2467743 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

Adding to 21343215141 its reverse (14151234312), we get a palindrome (35494449453).

The spelling of 21343215141 in words is "twenty-one billion, three hundred forty-three million, two hundred fifteen thousand, one hundred forty-one".