1221111120002 has 8 divisors (see below), whose sum is σ = 1861694002812. Its totient is φ = 600546452400.

The previous prime is 1221111119957. The next prime is 1221111120013. The reversal of 1221111120002 is 2000211111221.

It can be written as a sum of positive squares in 2 ways, for example, as 1219785504721 + 1325615281 = 1104439^2 + 36409^2 .

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

It is a super-2 number, since 2×1221111120002² (a number of 25 digits) contains 22 as substring.

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, 5004553649 + ... + 5004553892.

Almost surely, 2^{1221111120002} is an apocalyptic number.

1221111120002 is a deficient number, since it is larger than the sum of its proper divisors (640582882810).

1221111120002 is a wasteful number, since it uses less digits than its factorization.

1221111120002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10009107604.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1221111120002 its reverse (2000211111221), we get a palindrome (3221322231223).

The spelling of 1221111120002 in words is "one trillion, two hundred twenty-one billion, one hundred eleven million, one hundred twenty thousand, two".