1211102221122 has 12 divisors (see below), whose sum is σ = 2624054812470. Its totient is φ = 403700740368.

The previous prime is 1211102221117. The next prime is 1211102221127. The reversal of 1211102221122 is 2211222011121.

It is an interprime number because it is at equal distance from previous prime (1211102221117) and next prime (1211102221127).

It can be written as a sum of positive squares in only one way, i.e., 1204727955201 + 6374265921 = 1097601^2 + 79839^2 .

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: 67283456729 = 1211102221122 / (1 + 2 + 1 + 1 + 1 + 0 + 2 + 2 + 2 + 1 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 1211102221095 and 1211102221104.

It is not an unprimeable number, because it can be changed into a prime (1211102221127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33641728347 + ... + 33641728382.

Almost surely, 2^{1211102221122} is an apocalyptic number.

1211102221122 is an abundant number, since it is smaller than the sum of its proper divisors (1412952591348).

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

1211102221122 is a wasteful number, since it uses less digits than its factorization.

1211102221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67283456737 (or 67283456734 counting only the distinct ones).

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

Adding to 1211102221122 its reverse (2211222011121), we get a palindrome (3422324232243).

The spelling of 1211102221122 in words is "one trillion, two hundred eleven billion, one hundred two million, two hundred twenty-one thousand, one hundred twenty-two".