21012201000212 has 6 divisors (see below), whose sum is σ = 36771351750378. Its totient is φ = 10506100500104.

The previous prime is 21012201000211. The next prime is 21012201000223. The reversal of 21012201000212 is 21200010221012.

It can be written as a sum of positive squares in only one way, i.e., 16184319804676 + 4827881195536 = 4022974^2 + 2197244^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012201000211) by changing a digit.

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, 2626525125023 + ... + 2626525125030.

It is an arithmetic number, because the mean of its divisors is an integer number (6128558625063).

Almost surely, 2^{21012201000212} is an apocalyptic number.

It is an amenable number.

21012201000212 is a deficient number, since it is larger than the sum of its proper divisors (15759150750166).

21012201000212 is a wasteful number, since it uses less digits than its factorization.

21012201000212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5253050250057 (or 5253050250055 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21012201000212 its reverse (21200010221012), we get a palindrome (42212211221224).

The spelling of 21012201000212 in words is "twenty-one trillion, twelve billion, two hundred one million, two hundred twelve", and thus it is an aban number.