2102121362220 has 144 divisors (see below), whose sum is σ = 6473984880384. Its totient is φ = 509265257600.

The previous prime is 2102121362203. The next prime is 2102121362233. The reversal of 2102121362220 is 222631212012.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10874047 + ... + 11065673.

It is an arithmetic number, because the mean of its divisors is an integer number (44958228336).

Almost surely, 2^{2102121362220} is an apocalyptic number.

2102121362220 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 2102121362220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3236992440192).

2102121362220 is an abundant number, since it is smaller than the sum of its proper divisors (4371863518164).

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

2102121362220 is a wasteful number, since it uses less digits than its factorization.

2102121362220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193172 (or 193159 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 2102121362220 its reverse (222631212012), we get a palindrome (2324752574232).

The spelling of 2102121362220 in words is "two trillion, one hundred two billion, one hundred twenty-one million, three hundred sixty-two thousand, two hundred twenty".