20122221012012 has 72 divisors (see below), whose sum is σ = 58131577745696. Its totient is φ = 5749135087104.

The previous prime is 20122221012007. The next prime is 20122221012017. The reversal of 20122221012012 is 21021012222102.

It is a happy number.

20122221012012 is a `hidden beast` number, since 201 + 222 + 210 + 1 + 20 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (20122221012007) and next prime (20122221012017).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20122221012017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22014618 + ... + 22910430.

Almost surely, 2^{20122221012012} is an apocalyptic number.

It is an amenable number.

20122221012012 is an abundant number, since it is smaller than the sum of its proper divisors (38009356733684).

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

20122221012012 is a wasteful number, since it uses less digits than its factorization.

20122221012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984967 (or 984962 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20122221012012 its reverse (21021012222102), we get a palindrome (41143233234114).

The spelling of 20122221012012 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty-one million, twelve thousand, twelve".