1221402041222 has 8 divisors (see below), whose sum is σ = 1998657885672. Its totient is φ = 555182746000.

The previous prime is 1221402041213. The next prime is 1221402041273. The reversal of 1221402041222 is 2221402041221.

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

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, 27759137279 + ... + 27759137322.

It is an arithmetic number, because the mean of its divisors is an integer number (249832235709).

Almost surely, 2^{1221402041222} is an apocalyptic number.

1221402041222 is a deficient number, since it is larger than the sum of its proper divisors (777255844450).

1221402041222 is a wasteful number, since it uses less digits than its factorization.

1221402041222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55518274614.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 1221402041222 its reverse (2221402041221), we get a palindrome (3442804082443).

Subtracting 1221402041222 from its reverse (2221402041221), we obtain a palindrome (999999999999).

The spelling of 1221402041222 in words is "one trillion, two hundred twenty-one billion, four hundred two million, forty-one thousand, two hundred twenty-two".