2221021110212 has 6 divisors (see below), whose sum is σ = 3886786942878. Its totient is φ = 1110510555104.

The previous prime is 2221021110167. The next prime is 2221021110239. The reversal of 2221021110212 is 2120111201222.

It can be written as a sum of positive squares in only one way, i.e., 2201882047876 + 19139062336 = 1483874^2 + 138344^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277627638773 + ... + 277627638780.

It is an arithmetic number, because the mean of its divisors is an integer number (647797823813).

Almost surely, 2^{2221021110212} is an apocalyptic number.

It is an amenable number.

2221021110212 is a deficient number, since it is larger than the sum of its proper divisors (1665765832666).

2221021110212 is a wasteful number, since it uses less digits than its factorization.

2221021110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555255277557 (or 555255277555 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2221021110212 its reverse (2120111201222), we get a palindrome (4341132311434).

The spelling of 2221021110212 in words is "two trillion, two hundred twenty-one billion, twenty-one million, one hundred ten thousand, two hundred twelve".