2102111221012 has 96 divisors (see below), whose sum is σ = 4586830053120. Its totient is φ = 830536734720.

The previous prime is 2102111220953. The next prime is 2102111221019. The reversal of 2102111221012 is 2101221112012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102111221019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1607763 + ... + 2605594.

It is an arithmetic number, because the mean of its divisors is an integer number (47779479720).

Almost surely, 2^{2102111221012} is an apocalyptic number.

2102111221012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2102111221012 is an abundant number, since it is smaller than the sum of its proper divisors (2484718832108).

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

2102111221012 is a wasteful number, since it uses less digits than its factorization.

2102111221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4213441 (or 4213439 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2102111221012 its reverse (2101221112012), we get a palindrome (4203332333024).

The spelling of 2102111221012 in words is "two trillion, one hundred two billion, one hundred eleven million, two hundred twenty-one thousand, twelve".