2221211021212 has 24 divisors (see below), whose sum is σ = 4116040968816. Its totient is φ = 1045207811328.

The previous prime is 2221211021179. The next prime is 2221211021231. The reversal of 2221211021212 is 2121201121222.

It is a self number, because there is not a number n which added to its sum of digits gives 2221211021212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658 + ... + 2107705.

It is an arithmetic number, because the mean of its divisors is an integer number (171501707034).

Almost surely, 2^{2221211021212} is an apocalyptic number.

It is an amenable number.

2221211021212 is a deficient number, since it is larger than the sum of its proper divisors (1894829947604).

2221211021212 is a wasteful number, since it uses less digits than its factorization.

2221211021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123877 (or 2123875 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2221211021212 its reverse (2121201121222), we get a palindrome (4342412142434).

The spelling of 2221211021212 in words is "two trillion, two hundred twenty-one billion, two hundred eleven million, twenty-one thousand, two hundred twelve".