1212201021210 has 32 divisors (see below), whose sum is σ = 2931490723392. Its totient is φ = 320786019840.

The previous prime is 1212201021179. The next prime is 1212201021287. The reversal of 1212201021210 is 121201022121.

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 1212201021210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154220119 + ... + 154227978.

It is an arithmetic number, because the mean of its divisors is an integer number (91609085106).

Almost surely, 2^{1212201021210} is an apocalyptic number.

1212201021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212201021210 is an abundant number, since it is smaller than the sum of its proper divisors (1719289702182).

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

1212201021210 is a wasteful number, since it uses less digits than its factorization.

1212201021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308448238.

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

Adding to 1212201021210 its reverse (121201022121), we get a palindrome (1333402043331).

The spelling of 1212201021210 in words is "one trillion, two hundred twelve billion, two hundred one million, twenty-one thousand, two hundred ten".