1213211320002 has 48 divisors (see below), whose sum is σ = 2869667498880. Its totient is φ = 367373498400.

The previous prime is 1213211319997. The next prime is 1213211320033. The reversal of 1213211320002 is 2000231123121.

1213211320002 is a `hidden beast` number, since 1 + 21 + 321 + 1 + 320 + 0 + 0 + 2 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1945002 + ... + 2491877.

It is an arithmetic number, because the mean of its divisors is an integer number (59784739560).

Almost surely, 2^{1213211320002} is an apocalyptic number.

1213211320002 is an abundant number, since it is smaller than the sum of its proper divisors (1656456178878).

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

1213211320002 is a wasteful number, since it uses less digits than its factorization.

1213211320002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4438279 (or 4438276 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1213211320002 its reverse (2000231123121), we get a palindrome (3213442443123).

The spelling of 1213211320002 in words is "one trillion, two hundred thirteen billion, two hundred eleven million, three hundred twenty thousand, two".