21340401213 has 8 divisors (see below), whose sum is σ = 29690993088. Its totient is φ = 13608371744.

The previous prime is 21340401197. The next prime is 21340401253. The reversal of 21340401213 is 31210404312.

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 21340401213 - 2⁴ = 21340401197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21340401213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21340401253) 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, 154640520 + ... + 154640657.

It is an arithmetic number, because the mean of its divisors is an integer number (3711374136).

Almost surely, 2^21340401213 is an apocalyptic number.

21340401213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21340401213 is a deficient number, since it is larger than the sum of its proper divisors (8350591875).

21340401213 is a wasteful number, since it uses less digits than its factorization.

21340401213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309281203.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21340401213 its reverse (31210404312), we get a palindrome (52550805525).

The spelling of 21340401213 in words is "twenty-one billion, three hundred forty million, four hundred one thousand, two hundred thirteen".