21030979101 has 8 divisors (see below), whose sum is σ = 30590515104. Its totient is φ = 12746047920.

The previous prime is 21030979093. The next prime is 21030979159. The reversal of 21030979101 is 10197903012.

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

It is not a de Polignac number, because 21030979101 - 2³ = 21030979093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 637302397 = 21030979101 / (2 + 1 + 0 + 3 + 0 + 9 + 7 + 9 + 1 + 0 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030979171) 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, 318651166 + ... + 318651231.

It is an arithmetic number, because the mean of its divisors is an integer number (3823814388).

Almost surely, 2^21030979101 is an apocalyptic number.

It is an amenable number.

21030979101 is a deficient number, since it is larger than the sum of its proper divisors (9559536003).

21030979101 is a wasteful number, since it uses less digits than its factorization.

21030979101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637302411.

The product of its (nonzero) digits is 3402, while the sum is 33.

The spelling of 21030979101 in words is "twenty-one billion, thirty million, nine hundred seventy-nine thousand, one hundred one".