221202120012 has 24 divisors (see below), whose sum is σ = 530087964336. Its totient is φ = 71741227968.

The previous prime is 221202120011. The next prime is 221202120047. The reversal of 221202120012 is 210021202122.

It is a junction number, because it is equal to n+sod(n) for n = 221202119973 and 221202120000.

It is not an unprimeable number, because it can be changed into a prime (221202120011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249101043 + ... + 249101930.

It is an arithmetic number, because the mean of its divisors is an integer number (22086998514).

Almost surely, 2^221202120012 is an apocalyptic number.

It is an amenable number.

221202120012 is an abundant number, since it is smaller than the sum of its proper divisors (308885844324).

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

221202120012 is a wasteful number, since it uses less digits than its factorization.

221202120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498203017 (or 498203015 counting only the distinct ones).

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

Adding to 221202120012 its reverse (210021202122), we get a palindrome (431223322134).

The spelling of 221202120012 in words is "two hundred twenty-one billion, two hundred two million, one hundred twenty thousand, twelve".