1212011121222 has 80 divisors (see below), whose sum is σ = 2964422848464. Its totient is φ = 367061760000.

The previous prime is 1212011121221. The next prime is 1212011121227. The reversal of 1212011121222 is 2221211102121.

1212011121222 is a `hidden beast` number, since 121 + 201 + 1 + 121 + 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 = 1212011121195 and 1212011121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212011121221) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2869222 + ... + 3264422.

Almost surely, 2^{1212011121222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212011121222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1482211424232).

1212011121222 is an abundant number, since it is smaller than the sum of its proper divisors (1752411727242).

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

1212011121222 is a wasteful number, since it uses less digits than its factorization.

1212011121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396947 (or 396938 counting only the distinct ones).

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

Adding to 1212011121222 its reverse (2221211102121), we get a palindrome (3433222223343).

The spelling of 1212011121222 in words is "one trillion, two hundred twelve billion, eleven million, one hundred twenty-one thousand, two hundred twenty-two".