20111020102 has 8 divisors (see below), whose sum is σ = 30505480200. Its totient is φ = 9942526704.

The previous prime is 20111020087. The next prime is 20111020123. The reversal of 20111020102 is 20102011102.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56491452 + ... + 56491807.

It is an arithmetic number, because the mean of its divisors is an integer number (3813185025).

Almost surely, 2^20111020102 is an apocalyptic number.

20111020102 is a deficient number, since it is larger than the sum of its proper divisors (10394460098).

20111020102 is a wasteful number, since it uses less digits than its factorization.

20111020102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112983350.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20111020102 its reverse (20102011102), we get a palindrome (40213031204).

The spelling of 20111020102 in words is "twenty billion, one hundred eleven million, twenty thousand, one hundred two".