21007282101 has 16 divisors (see below), whose sum is σ = 30284493120. Its totient is φ = 12876048000.

The previous prime is 21007282099. The next prime is 21007282129. The reversal of 21007282101 is 10128270012.

It is not a de Polignac number, because 21007282101 - 2¹ = 21007282099 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21007282201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1063216 + ... + 1082793.

It is an arithmetic number, because the mean of its divisors is an integer number (1892780820).

Almost surely, 2^21007282101 is an apocalyptic number.

It is an amenable number.

21007282101 is a deficient number, since it is larger than the sum of its proper divisors (9277211019).

21007282101 is a wasteful number, since it uses less digits than its factorization.

21007282101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146276.

The product of its (nonzero) digits is 448, while the sum is 24.

The spelling of 21007282101 in words is "twenty-one billion, seven million, two hundred eighty-two thousand, one hundred one".