1211102121222 has 96 divisors (see below), whose sum is σ = 3096681928704. Its totient is φ = 334756281600.

The previous prime is 1211102121217. The next prime is 1211102121259. The reversal of 1211102121222 is 2221212011121.

1211102121222 is a `hidden beast` number, since 121 + 110 + 212 + 1 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1211102121195 and 1211102121204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12140953 + ... + 12240299.

It is an arithmetic number, because the mean of its divisors is an integer number (32257103424).

Almost surely, 2^{1211102121222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211102121222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1548340964352).

1211102121222 is an abundant number, since it is smaller than the sum of its proper divisors (1885579807482).

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

1211102121222 is a wasteful number, since it uses less digits than its factorization.

1211102121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102514 (or 102511 counting only the distinct ones).

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

Adding to 1211102121222 its reverse (2221212011121), we get a palindrome (3432314132343).

The spelling of 1211102121222 in words is "one trillion, two hundred eleven billion, one hundred two million, one hundred twenty-one thousand, two hundred twenty-two".