2121111102108 has 192 divisors, whose sum is σ = 5214107179008. Its totient is φ = 670482800640.

The previous prime is 2121111102107. The next prime is 2121111102119. The reversal of 2121111102108 is 8012011111212.

It is a super-2 number, since 2×2121111102108² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121111102107) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 834096685 + ... + 834099227.

It is an arithmetic number, because the mean of its divisors is an integer number (27156808224).

Almost surely, 2^{2121111102108} is an apocalyptic number.

It is an amenable number.

2121111102108 is an abundant number, since it is smaller than the sum of its proper divisors (3092996076900).

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

2121111102108 is a wasteful number, since it uses less digits than its factorization.

2121111102108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972 (or 2970 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 21.

The spelling of 2121111102108 in words is "two trillion, one hundred twenty-one billion, one hundred eleven million, one hundred two thousand, one hundred eight".