21201361415 has 8 divisors (see below), whose sum is σ = 27398682528. Its totient is φ = 15656389920.

The previous prime is 21201361409. The next prime is 21201361421. The reversal of 21201361415 is 51416310212.

It is an interprime number because it is at equal distance from previous prime (21201361409) and next prime (21201361421).

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

It is not a de Polignac number, because 21201361415 - 2¹² = 21201357319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163087331 + ... + 163087460.

It is an arithmetic number, because the mean of its divisors is an integer number (3424835316).

Almost surely, 2^21201361415 is an apocalyptic number.

21201361415 is a deficient number, since it is larger than the sum of its proper divisors (6197321113).

21201361415 is a wasteful number, since it uses less digits than its factorization.

21201361415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326174809.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 21201361415 its reverse (51416310212), we get a palindrome (72617671627).

The spelling of 21201361415 in words is "twenty-one billion, two hundred one million, three hundred sixty-one thousand, four hundred fifteen".