2101220221222 has 4 divisors (see below), whose sum is σ = 3151830331836. Its totient is φ = 1050610110610.

The previous prime is 2101220221169. The next prime is 2101220221301. The reversal of 2101220221222 is 2221220221012.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2101220221222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525305055304 + ... + 525305055307.

It is an arithmetic number, because the mean of its divisors is an integer number (787957582959).

Almost surely, 2^{2101220221222} is an apocalyptic number.

2101220221222 is a deficient number, since it is larger than the sum of its proper divisors (1050610110614).

2101220221222 is a wasteful number, since it uses less digits than its factorization.

2101220221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050610110613.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2101220221222 its reverse (2221220221012), we get a palindrome (4322440442234).

The spelling of 2101220221222 in words is "two trillion, one hundred one billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty-two".