21002222220210 has 128 divisors (see below), whose sum is σ = 69825570048000. Its totient is φ = 4364098119360.

The previous prime is 21002222220073. The next prime is 21002222220227. The reversal of 21002222220210 is 1202222220012.

21002222220210 is a `hidden beast` number, since 2 + 10 + 0 + 2 + 222 + 220 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 505083160 + ... + 505124739.

It is an arithmetic number, because the mean of its divisors is an integer number (545512266000).

Almost surely, 2^{21002222220210} is an apocalyptic number.

21002222220210 is an abundant number, since it is smaller than the sum of its proper divisors (48823347827790).

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

21002222220210 is a wasteful number, since it uses less digits than its factorization.

21002222220210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010207933 (or 1010207927 counting only the distinct ones).

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

Adding to 21002222220210 its reverse (1202222220012), we get a palindrome (22204444440222).

The spelling of 21002222220210 in words is "twenty-one trillion, two billion, two hundred twenty-two million, two hundred twenty thousand, two hundred ten".