20121220021222 has 8 divisors (see below), whose sum is σ = 30181974844896. Its totient is φ = 10060561739592.

The previous prime is 20121220021219. The next prime is 20121220021237. The reversal of 20121220021222 is 22212002212102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20121220021222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23612193 + ... + 24449500.

It is an arithmetic number, because the mean of its divisors is an integer number (3772746855612).

Almost surely, 2^{20121220021222} is an apocalyptic number.

20121220021222 is a deficient number, since it is larger than the sum of its proper divisors (10060754823674).

20121220021222 is a wasteful number, since it uses less digits than its factorization.

20121220021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48271022.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20121220021222 its reverse (22212002212102), we get a palindrome (42333222233324).

The spelling of 20121220021222 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty million, twenty-one thousand, two hundred twenty-two".