2102121121102 has 24 divisors (see below), whose sum is σ = 3230863383384. Its totient is φ = 1025696236752.

The previous prime is 2102121121099. The next prime is 2102121121103. The reversal of 2102121121102 is 2011211212012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102121121103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133473 + ... + 2054764.

It is an arithmetic number, because the mean of its divisors is an integer number (134619307641).

Almost surely, 2^{2102121121102} is an apocalyptic number.

2102121121102 is a deficient number, since it is larger than the sum of its proper divisors (1128742262282).

2102121121102 is a wasteful number, since it uses less digits than its factorization.

2102121121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188480 (or 2188413 counting only the distinct ones).

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

Adding to 2102121121102 its reverse (2011211212012), we get a palindrome (4113332333114).

The spelling of 2102121121102 in words is "two trillion, one hundred two billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred two".