20101220102 has 8 divisors (see below), whose sum is σ = 30155329512. Its totient is φ = 10049443600.

The previous prime is 20101220099. The next prime is 20101220119. The reversal of 20101220102 is 20102210102.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561524 + ... + 596247.

It is an arithmetic number, because the mean of its divisors is an integer number (3769416189).

Almost surely, 2^20101220102 is an apocalyptic number.

20101220102 is a deficient number, since it is larger than the sum of its proper divisors (10054109410).

20101220102 is a wasteful number, since it uses less digits than its factorization.

20101220102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166454.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20101220102 its reverse (20102210102), we get a palindrome (40203430204).

The spelling of 20101220102 in words is "twenty billion, one hundred one million, two hundred twenty thousand, one hundred two".