21212022000012 has 24 divisors (see below), whose sum is σ = 49505309767536. Its totient is φ = 7069160890368.

The previous prime is 21212022000011. The next prime is 21212022000061. The reversal of 21212022000012 is 21000022021212.

It is a junction number, because it is equal to n+sod(n) for n = 21212021999955 and 21212022000000.

It is not an unprimeable number, because it can be changed into a prime (21212022000011) 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, 189080293 + ... + 189192444.

It is an arithmetic number, because the mean of its divisors is an integer number (2062721240314).

Almost surely, 2^{21212022000012} is an apocalyptic number.

It is an amenable number.

21212022000012 is an abundant number, since it is smaller than the sum of its proper divisors (28293287767524).

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

21212022000012 is a wasteful number, since it uses less digits than its factorization.

21212022000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378277417 (or 378277415 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21212022000012 its reverse (21000022021212), we get a palindrome (42212044021224).

It can be divided in two parts, 2121202 and 2000012, that added together give a palindrome (4121214).

The spelling of 21212022000012 in words is "twenty-one trillion, two hundred twelve billion, twenty-two million, twelve", and thus it is an aban number.