1211202202028 has 48 divisors (see below), whose sum is σ = 2624747892480. Its totient is φ = 476217278784.

The previous prime is 1211202202027. The next prime is 1211202202037. The reversal of 1211202202028 is 8202022021121.

It is a happy number.

It is a super-2 number, since 2×1211202202028² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211202201994 and 1211202202012.

It is not an unprimeable number, because it can be changed into a prime (1211202202027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10147658 + ... + 10266321.

It is an arithmetic number, because the mean of its divisors is an integer number (54682247760).

Almost surely, 2^{1211202202028} is an apocalyptic number.

It is an amenable number.

1211202202028 is an abundant number, since it is smaller than the sum of its proper divisors (1413545690452).

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

1211202202028 is a wasteful number, since it uses less digits than its factorization.

1211202202028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20414166 (or 20414164 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 1211202202028 its reverse (8202022021121), we get a palindrome (9413224223149).

The spelling of 1211202202028 in words is "one trillion, two hundred eleven billion, two hundred two million, two hundred two thousand, twenty-eight".