20111042121102 has 48 divisors (see below), whose sum is σ = 43734973857120. Its totient is φ = 6678916808256.

The previous prime is 20111042121091. The next prime is 20111042121139. The reversal of 20111042121102 is 20112124011102.

20111042121102 is a `hidden beast` number, since 20 + 1 + 1 + 10 + 421 + 211 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18223599 + ... + 19295637.

It is an arithmetic number, because the mean of its divisors is an integer number (911145288690).

Almost surely, 2^{20111042121102} is an apocalyptic number.

20111042121102 is an abundant number, since it is smaller than the sum of its proper divisors (23623931736018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111042121102 is a wasteful number, since it uses less digits than its factorization.

20111042121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075897 (or 1075894 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20111042121102 its reverse (20112124011102), we get a palindrome (40223166132204).

The spelling of 20111042121102 in words is "twenty trillion, one hundred eleven billion, forty-two million, one hundred twenty-one thousand, one hundred two".