1221210010222 has 8 divisors (see below), whose sum is σ = 1831819842216. Its totient is φ = 610603396152.

The previous prime is 1221210010117. The next prime is 1221210010231. The reversal of 1221210010222 is 2220100121221.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1221210010196 and 1221210010205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728553 + ... + 1724299.

It is an arithmetic number, because the mean of its divisors is an integer number (228977480277).

Almost surely, 2^{1221210010222} is an apocalyptic number.

1221210010222 is a deficient number, since it is larger than the sum of its proper divisors (610609831994).

1221210010222 is an equidigital number, since it uses as much as digits as its factorization.

1221210010222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608962.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1221210010222 its reverse (2220100121221), we get a palindrome (3441310131443).

The spelling of 1221210010222 in words is "one trillion, two hundred twenty-one billion, two hundred ten million, ten thousand, two hundred twenty-two".