20021121022012 has 12 divisors (see below), whose sum is σ = 38222140133016. Its totient is φ = 9100509555440.

The previous prime is 20021121021991. The next prime is 20021121022033. The reversal of 20021121022012 is 21022012112002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20021121021991) and next prime (20021121022033).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227512738843 + ... + 227512738930.

It is an arithmetic number, because the mean of its divisors is an integer number (3185178344418).

Almost surely, 2^{20021121022012} is an apocalyptic number.

20021121022012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20021121022012 is a deficient number, since it is larger than the sum of its proper divisors (18201019111004).

20021121022012 is a wasteful number, since it uses less digits than its factorization.

20021121022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455025477788 (or 455025477786 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20021121022012 its reverse (21022012112002), we get a palindrome (41043133134014).

The spelling of 20021121022012 in words is "twenty trillion, twenty-one billion, one hundred twenty-one million, twenty-two thousand, twelve".