1220021121112 has 16 divisors (see below), whose sum is σ = 2319758470800. Its totient is φ = 601418862240.

The previous prime is 1220021121101. The next prime is 1220021121119. The reversal of 1220021121112 is 2111211200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220021121119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1073961687 + ... + 1073962822.

It is an arithmetic number, because the mean of its divisors is an integer number (144984904425).

Almost surely, 2^{1220021121112} is an apocalyptic number.

It is an amenable number.

1220021121112 is a deficient number, since it is larger than the sum of its proper divisors (1099737349688).

1220021121112 is a wasteful number, since it uses less digits than its factorization.

1220021121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147924586 (or 2147924582 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1220021121112 its reverse (2111211200221), we get a palindrome (3331232321333).

The spelling of 1220021121112 in words is "one trillion, two hundred twenty billion, twenty-one million, one hundred twenty-one thousand, one hundred twelve".