20812002101 has 8 divisors (see below), whose sum is σ = 22705139808. Its totient is φ = 18919054000.

The previous prime is 20812002067. The next prime is 20812002103. The reversal of 20812002101 is 10120021802.

It is a happy number.

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

It is not a de Polignac number, because 20812002101 - 2⁶ = 20812002037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20812002101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20812002103) 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, 281171 + ... + 347391.

It is an arithmetic number, because the mean of its divisors is an integer number (2838142476).

Almost surely, 2^20812002101 is an apocalyptic number.

It is an amenable number.

20812002101 is a deficient number, since it is larger than the sum of its proper divisors (1893137707).

20812002101 is a wasteful number, since it uses less digits than its factorization.

20812002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94803.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20812002101 its reverse (10120021802), we get a palindrome (30932023903).

The spelling of 20812002101 in words is "twenty billion, eight hundred twelve million, two thousand, one hundred one".