20021222233212 has 96 divisors (see below), whose sum is σ = 47462169957888. Its totient is φ = 6567380861184.

The previous prime is 20021222233189. The next prime is 20021222233217. The reversal of 20021222233212 is 21233222212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021222233217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6770787238 + ... + 6770790194.

It is an arithmetic number, because the mean of its divisors is an integer number (494397603728).

Almost surely, 2^{20021222233212} is an apocalyptic number.

It is an amenable number.

20021222233212 is an abundant number, since it is smaller than the sum of its proper divisors (27440947724676).

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

20021222233212 is a wasteful number, since it uses less digits than its factorization.

20021222233212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8835 (or 8833 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20021222233212 its reverse (21233222212002), we get a palindrome (41254444445214).

The spelling of 20021222233212 in words is "twenty trillion, twenty-one billion, two hundred twenty-two million, two hundred thirty-three thousand, two hundred twelve".