2102200021212 has 12 divisors (see below), whose sum is σ = 4905133382856. Its totient is φ = 700733340400.

The previous prime is 2102200021211. The next prime is 2102200021249. The reversal of 2102200021212 is 2121200022012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 2102200021191 and 2102200021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102200021211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87591667539 + ... + 87591667562.

It is an arithmetic number, because the mean of its divisors is an integer number (408761115238).

Almost surely, 2^{2102200021212} is an apocalyptic number.

It is an amenable number.

2102200021212 is an abundant number, since it is smaller than the sum of its proper divisors (2802933361644).

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

2102200021212 is a wasteful number, since it uses less digits than its factorization.

2102200021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175183335108 (or 175183335106 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2102200021212 its reverse (2121200022012), we get a palindrome (4223400043224).

The spelling of 2102200021212 in words is "two trillion, one hundred two billion, two hundred million, twenty-one thousand, two hundred twelve".