21234122877 has 8 divisors (see below), whose sum is σ = 30885996960. Its totient is φ = 12869165360.

The previous prime is 21234122843. The next prime is 21234122893. The reversal of 21234122877 is 77822143212.

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 21234122877 - 2¹¹ = 21234120829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234122177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321729102 + ... + 321729167.

It is an arithmetic number, because the mean of its divisors is an integer number (3860749620).

Almost surely, 2^21234122877 is an apocalyptic number.

It is an amenable number.

21234122877 is a deficient number, since it is larger than the sum of its proper divisors (9651874083).

21234122877 is a wasteful number, since it uses less digits than its factorization.

21234122877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643458283.

The product of its digits is 75264, while the sum is 39.

The spelling of 21234122877 in words is "twenty-one billion, two hundred thirty-four million, one hundred twenty-two thousand, eight hundred seventy-seven".