2001212220210 has 128 divisors (see below), whose sum is σ = 5762141798400. Its totient is φ = 435161583360.

The previous prime is 2001212220187. The next prime is 2001212220229. The reversal of 2001212220210 is 120222121002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2001212220210.

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, 2221045 + ... + 2989224.

It is an arithmetic number, because the mean of its divisors is an integer number (45016732800).

Almost surely, 2^{2001212220210} is an apocalyptic number.

2001212220210 is an abundant number, since it is smaller than the sum of its proper divisors (3760929578190).

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

2001212220210 is a wasteful number, since it uses less digits than its factorization.

2001212220210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5210376.

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

Adding to 2001212220210 its reverse (120222121002), we get a palindrome (2121434341212).

The spelling of 2001212220210 in words is "two trillion, one billion, two hundred twelve million, two hundred twenty thousand, two hundred ten".