10001221212210 has 64 divisors (see below), whose sum is σ = 25661614447872. Its totient is φ = 2485740404736.

The previous prime is 10001221212163. The next prime is 10001221212247. The reversal of 10001221212210 is 1221212210001.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10001221212210.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95142799 + ... + 95247858.

It is an arithmetic number, because the mean of its divisors is an integer number (400962725748).

Almost surely, 2^{10001221212210} is an apocalyptic number.

10001221212210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10001221212210 is an abundant number, since it is smaller than the sum of its proper divisors (15660393235662).

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

10001221212210 is a wasteful number, since it uses less digits than its factorization.

10001221212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190390787.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 10001221212210 its reverse (1221212210001), we get a palindrome (11222433422211).

The spelling of 10001221212210 in words is "ten trillion, one billion, two hundred twenty-one million, two hundred twelve thousand, two hundred ten".