1213202122000 has 80 divisors (see below), whose sum is σ = 3200206673664. Its totient is φ = 441164400000.

The previous prime is 1213202121983. The next prime is 1213202122003. The reversal of 1213202122000 is 2212023121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1213202122003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27550776 + ... + 27594775.

Almost surely, 2^{1213202122000} is an apocalyptic number.

1213202122000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213202122000 is an abundant number, since it is smaller than the sum of its proper divisors (1987004551664).

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

1213202122000 is a wasteful number, since it uses less digits than its factorization.

1213202122000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55145585 (or 55145569 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1213202122000 its reverse (2212023121), we get a palindrome (1215414145121).

The spelling of 1213202122000 in words is "one trillion, two hundred thirteen billion, two hundred two million, one hundred twenty-two thousand".