20111121210102 has 64 divisors (see below), whose sum is σ = 45904127238144. Its totient is φ = 5818974681600.

The previous prime is 20111121210031. The next prime is 20111121210127. The reversal of 20111121210102 is 20101212111102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5062288 + ... + 8114739.

It is an arithmetic number, because the mean of its divisors is an integer number (717251988096).

Almost surely, 2^{20111121210102} is an apocalyptic number.

20111121210102 is an abundant number, since it is smaller than the sum of its proper divisors (25793006028042).

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

20111121210102 is a wasteful number, since it uses less digits than its factorization.

20111121210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13178213.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20111121210102 its reverse (20101212111102), we get a palindrome (40212333321204).

The spelling of 20111121210102 in words is "twenty trillion, one hundred eleven billion, one hundred twenty-one million, two hundred ten thousand, one hundred two".