2100220021212 has 96 divisors (see below), whose sum is σ = 5097568203840. Its totient is φ = 672443596800.

The previous prime is 2100220021199. The next prime is 2100220021243. The reversal of 2100220021212 is 2121200220012.

It is a junction number, because it is equal to n+sod(n) for n = 2100220021191 and 2100220021200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17209464 + ... + 17331072.

It is an arithmetic number, because the mean of its divisors is an integer number (53099668790).

Almost surely, 2^{2100220021212} is an apocalyptic number.

It is an amenable number.

2100220021212 is an abundant number, since it is smaller than the sum of its proper divisors (2997348182628).

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

2100220021212 is a wasteful number, since it uses less digits than its factorization.

2100220021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122151 (or 122149 counting only the distinct ones).

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

Adding to 2100220021212 its reverse (2121200220012), we get a palindrome (4221420241224).

The spelling of 2100220021212 in words is "two trillion, one hundred billion, two hundred twenty million, twenty-one thousand, two hundred twelve".