21200222002212 has 36 divisors (see below), whose sum is σ = 58461218249616. Its totient is φ = 6424309697520.

The previous prime is 21200222002153. The next prime is 21200222002217. The reversal of 21200222002212 is 21220022200212.

21200222002212 is a `hidden beast` number, since 21 + 200 + 2 + 220 + 0 + 221 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×21200222002212³ (a number of 41 digits) contains 333 as substring.

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 (21200222002217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26767956678 + ... + 26767957469.

It is an arithmetic number, because the mean of its divisors is an integer number (1623922729156).

Almost surely, 2^{21200222002212} is an apocalyptic number.

21200222002212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21200222002212 is an abundant number, since it is smaller than the sum of its proper divisors (37260996247404).

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

21200222002212 is a wasteful number, since it uses less digits than its factorization.

21200222002212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53535914168 (or 53535914163 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21200222002212 its reverse (21220022200212), we get a palindrome (42420244202424).

The spelling of 21200222002212 in words is "twenty-one trillion, two hundred billion, two hundred twenty-two million, two thousand, two hundred twelve".