20121020021222 has 4 divisors (see below), whose sum is σ = 30181530031836. Its totient is φ = 10060510010610.

The previous prime is 20121020021209. The next prime is 20121020021293. The reversal of 20121020021222 is 22212002012102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20121020021222.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5030255005304 + ... + 5030255005307.

It is an arithmetic number, because the mean of its divisors is an integer number (7545382507959).

Almost surely, 2^{20121020021222} is an apocalyptic number.

20121020021222 is a deficient number, since it is larger than the sum of its proper divisors (10060510010614).

20121020021222 is a wasteful number, since it uses less digits than its factorization.

20121020021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10060510010613.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20121020021222 its reverse (22212002012102), we get a palindrome (42333022033324).

The spelling of 20121020021222 in words is "twenty trillion, one hundred twenty-one billion, twenty million, twenty-one thousand, two hundred twenty-two".