1221011012222 has 8 divisors (see below), whose sum is σ = 1911147671376. Its totient is φ = 583961788432.

The previous prime is 1221011012219. The next prime is 1221011012237. The reversal of 1221011012222 is 2222101101221.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1221011012222.

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, 13271858783 + ... + 13271858874.

It is an arithmetic number, because the mean of its divisors is an integer number (238893458922).

Almost surely, 2^{1221011012222} is an apocalyptic number.

1221011012222 is a deficient number, since it is larger than the sum of its proper divisors (690136659154).

1221011012222 is a wasteful number, since it uses less digits than its factorization.

1221011012222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26543717682.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1221011012222 its reverse (2222101101221), we get a palindrome (3443112113443).

The spelling of 1221011012222 in words is "one trillion, two hundred twenty-one billion, eleven million, twelve thousand, two hundred twenty-two".