1221210202222 has 8 divisors (see below), whose sum is σ = 1832139707616. Its totient is φ = 610496966352.

The previous prime is 1221210202169. The next prime is 1221210202229. The reversal of 1221210202222 is 2222020121221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1221210202222² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221210202222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221210202229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54053263 + ... + 54075850.

It is an arithmetic number, because the mean of its divisors is an integer number (229017463452).

Almost surely, 2^{1221210202222} is an apocalyptic number.

1221210202222 is a deficient number, since it is larger than the sum of its proper divisors (610929505394).

1221210202222 is a wasteful number, since it uses less digits than its factorization.

1221210202222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108134762.

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

Adding to 1221210202222 its reverse (2222020121221), we get a palindrome (3443230323443).

The spelling of 1221210202222 in words is "one trillion, two hundred twenty-one billion, two hundred ten million, two hundred two thousand, two hundred twenty-two".