21202122102109 has 8 divisors (see below), whose sum is σ = 22842934765952. Its totient is φ = 19562720894640.

The previous prime is 21202122102107. The next prime is 21202122102127. The reversal of 21202122102109 is 90120122120212.

It is a happy number.

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 21202122102109 - 2¹ = 21202122102107 is a prime.

It is a super-2 number, since 2×21202122102109² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202122102103) 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, 352832889 + ... + 352892974.

It is an arithmetic number, because the mean of its divisors is an integer number (2855366845744).

Almost surely, 2^{21202122102109} is an apocalyptic number.

It is an amenable number.

21202122102109 is a deficient number, since it is larger than the sum of its proper divisors (1640812663843).

21202122102109 is a wasteful number, since it uses less digits than its factorization.

21202122102109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705728187.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 21202122102109 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-two million, one hundred two thousand, one hundred nine".