21112072577 has 8 divisors (see below), whose sum is σ = 22031460864. Its totient is φ = 20192807008.

The previous prime is 21112072573. The next prime is 21112072603. The reversal of 21112072577 is 77527021112.

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 21112072577 - 2² = 21112072573 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112072571) 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, 578288 + ... + 613710.

It is an arithmetic number, because the mean of its divisors is an integer number (2753932608).

Almost surely, 2^21112072577 is an apocalyptic number.

It is an amenable number.

21112072577 is a deficient number, since it is larger than the sum of its proper divisors (919388287).

21112072577 is a wasteful number, since it uses less digits than its factorization.

21112072577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61359.

The product of its (nonzero) digits is 13720, while the sum is 35.

Adding to 21112072577 its reverse (77527021112), we get a palindrome (98639093689).

The spelling of 21112072577 in words is "twenty-one billion, one hundred twelve million, seventy-two thousand, five hundred seventy-seven".