1211211221202 has 12 divisors (see below), whose sum is σ = 2624290979310. Its totient is φ = 403737073728.

The previous prime is 1211211221197. The next prime is 1211211221239. The reversal of 1211211221202 is 2021221121121.

1211211221202 is a `hidden beast` number, since 1 + 211 + 211 + 221 + 20 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1137787022241 + 73424198961 = 1066671^2 + 270969^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 67289512289 = 1211211221202 / (1 + 2 + 1 + 1 + 2 + 1 + 1 + 2 + 2 + 1 + 2 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33644756127 + ... + 33644756162.

Almost surely, 2^{1211211221202} is an apocalyptic number.

1211211221202 is an abundant number, since it is smaller than the sum of its proper divisors (1413079758108).

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

1211211221202 is a wasteful number, since it uses less digits than its factorization.

1211211221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67289512297 (or 67289512294 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1211211221202 its reverse (2021221121121), we get a palindrome (3232432342323).

The spelling of 1211211221202 in words is "one trillion, two hundred eleven billion, two hundred eleven million, two hundred twenty-one thousand, two hundred two".