1221201010222 has 16 divisors (see below), whose sum is σ = 1854504271872. Its totient is φ = 603076040280.

The previous prime is 1221201010207. The next prime is 1221201010223. The reversal of 1221201010222 is 2220101021221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1221201010196 and 1221201010205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221201010223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10723354 + ... + 10836637.

It is an arithmetic number, because the mean of its divisors is an integer number (115906516992).

Almost surely, 2^{1221201010222} is an apocalyptic number.

1221201010222 is a deficient number, since it is larger than the sum of its proper divisors (633303261650).

1221201010222 is a wasteful number, since it uses less digits than its factorization.

1221201010222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21560343.

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

Adding to 1221201010222 its reverse (2220101021221), we get a palindrome (3441302031443).

The spelling of 1221201010222 in words is "one trillion, two hundred twenty-one billion, two hundred one million, ten thousand, two hundred twenty-two".