20111203102 has 4 divisors (see below), whose sum is σ = 30166804656. Its totient is φ = 10055601550.

The previous prime is 20111203067. The next prime is 20111203129. The reversal of 20111203102 is 20130211102.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5027800774 + ... + 5027800777.

It is an arithmetic number, because the mean of its divisors is an integer number (7541701164).

Almost surely, 2^20111203102 is an apocalyptic number.

20111203102 is a deficient number, since it is larger than the sum of its proper divisors (10055601554).

20111203102 is a wasteful number, since it uses less digits than its factorization.

20111203102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10055601553.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20111203102 its reverse (20130211102), we get a palindrome (40241414204).

The spelling of 20111203102 in words is "twenty billion, one hundred eleven million, two hundred three thousand, one hundred two".