21210222220002 has 32 divisors (see below), whose sum is σ = 47450161584000. Its totient is φ = 7022623909104.

The previous prime is 21210222219973. The next prime is 21210222220003. The reversal of 21210222220002 is 20002222201212.

21210222220002 is a `hidden beast` number, since 212 + 10 + 222 + 220 + 0 + 0 + 2 = 666.

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 (21210222220003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1318051998 + ... + 1318068089.

It is an arithmetic number, because the mean of its divisors is an integer number (1482817549500).

Almost surely, 2^{21210222220002} is an apocalyptic number.

21210222220002 is an abundant number, since it is smaller than the sum of its proper divisors (26239939363998).

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

21210222220002 is a wasteful number, since it uses less digits than its factorization.

21210222220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2636120247 (or 2636120241 counting only the distinct ones).

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

Adding to 21210222220002 its reverse (20002222201212), we get a palindrome (41212444421214).

The spelling of 21210222220002 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-two million, two hundred twenty thousand, two".