21020022022012 has 24 divisors (see below), whose sum is σ = 39789170816976. Its totient is φ = 9658810520448.

The previous prime is 21020022022009. The next prime is 21020022022019. The reversal of 21020022022012 is 21022022002012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020022022019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890365273 + ... + 890388880.

It is an arithmetic number, because the mean of its divisors is an integer number (1657882117374).

Almost surely, 2^{21020022022012} is an apocalyptic number.

It is an amenable number.

21020022022012 is a deficient number, since it is larger than the sum of its proper divisors (18769148794964).

21020022022012 is a wasteful number, since it uses less digits than its factorization.

21020022022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780754397 (or 1780754395 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21020022022012 its reverse (21022022002012), we get a palindrome (42042044024024).

The spelling of 21020022022012 in words is "twenty-one trillion, twenty billion, twenty-two million, twenty-two thousand, twelve".