2100021200212 has 72 divisors (see below), whose sum is σ = 4218467371776. Its totient is φ = 911165059584.

The previous prime is 2100021200197. The next prime is 2100021200231. The reversal of 2100021200212 is 2120021200012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 2100021200192 and 2100021200201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9811723 + ... + 10023469.

It is an arithmetic number, because the mean of its divisors is an integer number (58589824608).

Almost surely, 2^{2100021200212} is an apocalyptic number.

It is an amenable number.

2100021200212 is an abundant number, since it is smaller than the sum of its proper divisors (2118446171564).

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

2100021200212 is a wasteful number, since it uses less digits than its factorization.

2100021200212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212657 (or 212642 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2100021200212 its reverse (2120021200012), we get a palindrome (4220042400224).

The spelling of 2100021200212 in words is "two trillion, one hundred billion, twenty-one million, two hundred thousand, two hundred twelve".