2102102131220 has 192 divisors, whose sum is σ = 5557856532480. Its totient is φ = 650054135808.

The previous prime is 2102102131147. The next prime is 2102102131279. The reversal of 2102102131220 is 221312012012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52758266 + ... + 52798094.

It is an arithmetic number, because the mean of its divisors is an integer number (28947169440).

Almost surely, 2^{2102102131220} is an apocalyptic number.

2102102131220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2102102131220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2778928266240).

2102102131220 is an abundant number, since it is smaller than the sum of its proper divisors (3455754401260).

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

2102102131220 is a wasteful number, since it uses less digits than its factorization.

2102102131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40522 (or 40520 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2102102131220 its reverse (221312012012), we get a palindrome (2323414143232).

It can be divided in two parts, 2102102 and 131220, that added together give a palindrome (2233322).

The spelling of 2102102131220 in words is "two trillion, one hundred two billion, one hundred two million, one hundred thirty-one thousand, two hundred twenty".