1212022221111 has 48 divisors (see below), whose sum is σ = 1963587042720. Its totient is φ = 738474796800.

The previous prime is 1212022221071. The next prime is 1212022221121. The reversal of 1212022221111 is 1111222202121.

It is not a de Polignac number, because 1212022221111 - 2⁹ = 1212022220599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212022221121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 854086 + ... + 1775811.

It is an arithmetic number, because the mean of its divisors is an integer number (40908063390).

Almost surely, 2^{1212022221111} is an apocalyptic number.

1212022221111 is a deficient number, since it is larger than the sum of its proper divisors (751564821609).

1212022221111 is a wasteful number, since it uses less digits than its factorization.

1212022221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630033 (or 2630014 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212022221111 its reverse (1111222202121), we get a palindrome (2323244423232).

The spelling of 1212022221111 in words is "one trillion, two hundred twelve billion, twenty-two million, two hundred twenty-one thousand, one hundred eleven".