1200020221212 has 48 divisors (see below), whose sum is σ = 2916040932000. Its totient is φ = 383621351680.

The previous prime is 1200020221201. The next prime is 1200020221217. The reversal of 1200020221212 is 2121220200021.

It is a junction number, because it is equal to n+sod(n) for n = 1200020221191 and 1200020221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200020221217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11519739 + ... + 11623442.

It is an arithmetic number, because the mean of its divisors is an integer number (60750852750).

Almost surely, 2^{1200020221212} is an apocalyptic number.

1200020221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1200020221212 is an abundant number, since it is smaller than the sum of its proper divisors (1716020710788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1200020221212 is a wasteful number, since it uses less digits than its factorization.

1200020221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23143366 (or 23143364 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1200020221212 its reverse (2121220200021), we get a palindrome (3321240421233).

The spelling of 1200020221212 in words is "one trillion, two hundred billion, twenty million, two hundred twenty-one thousand, two hundred twelve".