21134234121243 has 8 divisors (see below), whose sum is σ = 28179000061968. Its totient is φ = 14089478797344.

The previous prime is 21134234121197. The next prime is 21134234121251. The reversal of 21134234121243 is 34212143243112.

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

It is not a de Polignac number, because 21134234121243 - 2¹³ = 21134234113051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21134234121263) 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, 6608521 + ... + 9270437.

It is an arithmetic number, because the mean of its divisors is an integer number (3522375007746).

Almost surely, 2^{21134234121243} is an apocalyptic number.

21134234121243 is a deficient number, since it is larger than the sum of its proper divisors (7044765940725).

21134234121243 is a wasteful number, since it uses less digits than its factorization.

21134234121243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308413.

The product of its digits is 27648, while the sum is 33.

Adding to 21134234121243 its reverse (34212143243112), we get a palindrome (55346377364355).

The spelling of 21134234121243 in words is "twenty-one trillion, one hundred thirty-four billion, two hundred thirty-four million, one hundred twenty-one thousand, two hundred forty-three".