201220021222 has 96 divisors (see below), whose sum is σ = 343795560192. Its totient is φ = 88219560000.

The previous prime is 201220021213. The next prime is 201220021243. The reversal of 201220021222 is 222120022102.

It is a junction number, because it is equal to n+sod(n) for n = 201220021196 and 201220021205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 207229197 + ... + 207230167.

It is an arithmetic number, because the mean of its divisors is an integer number (3581203752).

Almost surely, 2^201220021222 is an apocalyptic number.

201220021222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

201220021222 is a deficient number, since it is larger than the sum of its proper divisors (142575538970).

201220021222 is a wasteful number, since it uses less digits than its factorization.

201220021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306 (or 1295 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 201220021222 its reverse (222120022102), we get a palindrome (423340043324).

The spelling of 201220021222 in words is "two hundred one billion, two hundred twenty million, twenty-one thousand, two hundred twenty-two".