1212210021210 has 64 divisors (see below), whose sum is σ = 2930944252032. Its totient is φ = 320852192256.

The previous prime is 1212210021203. The next prime is 1212210021221. The reversal of 1212210021210 is 121200122121.

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 1212210021210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38753997 + ... + 38785263.

It is an arithmetic number, because the mean of its divisors is an integer number (45796003938).

Almost surely, 2^{1212210021210} is an apocalyptic number.

1212210021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212210021210 is an abundant number, since it is smaller than the sum of its proper divisors (1718734230822).

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

1212210021210 is a wasteful number, since it uses less digits than its factorization.

1212210021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40847.

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

Adding to 1212210021210 its reverse (121200122121), we get a palindrome (1333410143331).

The spelling of 1212210021210 in words is "one trillion, two hundred twelve billion, two hundred ten million, twenty-one thousand, two hundred ten".