2102111122140 has 72 divisors (see below), whose sum is σ = 6751486319760. Its totient is φ = 527588673024.

The previous prime is 2102111122121. The next prime is 2102111122147. The reversal of 2102111122140 is 412211112012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102111122147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 343479150 + ... + 343485269.

It is an arithmetic number, because the mean of its divisors is an integer number (93770643330).

Almost surely, 2^{2102111122140} is an apocalyptic number.

2102111122140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102111122140 is an abundant number, since it is smaller than the sum of its proper divisors (4649375197620).

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

2102111122140 is a wasteful number, since it uses less digits than its factorization.

2102111122140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686964451 (or 686964446 counting only the distinct ones).

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

Adding to 2102111122140 its reverse (412211112012), we get a palindrome (2514322234152).

The spelling of 2102111122140 in words is "two trillion, one hundred two billion, one hundred eleven million, one hundred twenty-two thousand, one hundred forty".