21115346261501 has 8 divisors (see below), whose sum is σ = 22358531580480. Its totient is φ = 19872283845568.

The previous prime is 21115346261413. The next prime is 21115346261539. The reversal of 21115346261501 is 10516264351112.

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 21115346261501 - 2¹⁴ = 21115346245117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21115346261561) 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, 30371921 + ... + 31059366.

It is an arithmetic number, because the mean of its divisors is an integer number (2794816447560).

Almost surely, 2^{21115346261501} is an apocalyptic number.

It is an amenable number.

21115346261501 is a deficient number, since it is larger than the sum of its proper divisors (1243185318979).

21115346261501 is a wasteful number, since it uses less digits than its factorization.

21115346261501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61451523.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 21115346261501 in words is "twenty-one trillion, one hundred fifteen billion, three hundred forty-six million, two hundred sixty-one thousand, five hundred one".