21150007065061 has 8 divisors (see below), whose sum is σ = 24171464816640. Its totient is φ = 18128556356208.

The previous prime is 21150007065043. The next prime is 21150007065091. The reversal of 21150007065061 is 16056070005112.

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 21150007065061 - 2⁷ = 21150007064933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150007065091) 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, 9342300 + ... + 11383258.

It is an arithmetic number, because the mean of its divisors is an integer number (3021433102080).

Almost surely, 2^{21150007065061} is an apocalyptic number.

It is an amenable number.

21150007065061 is a deficient number, since it is larger than the sum of its proper divisors (3021457751579).

21150007065061 is a wasteful number, since it uses less digits than its factorization.

21150007065061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521363.

The product of its (nonzero) digits is 12600, while the sum is 34.

The spelling of 21150007065061 in words is "twenty-one trillion, one hundred fifty billion, seven million, sixty-five thousand, sixty-one".