2100001111212 has 48 divisors (see below), whose sum is σ = 4919903089920. Its totient is φ = 697162406592.

The previous prime is 2100001111211. The next prime is 2100001111217. The reversal of 2100001111212 is 2121111000012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (2100001111211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3080698 + ... + 3700094.

It is an arithmetic number, because the mean of its divisors is an integer number (102497981040).

Almost surely, 2^{2100001111212} is an apocalyptic number.

It is an amenable number.

2100001111212 is an abundant number, since it is smaller than the sum of its proper divisors (2819901978708).

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

2100001111212 is a wasteful number, since it uses less digits than its factorization.

2100001111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620550 (or 620548 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2100001111212 its reverse (2121111000012), we get a palindrome (4221112111224).

The spelling of 2100001111212 in words is "two trillion, one hundred billion, one million, one hundred eleven thousand, two hundred twelve".