1011211221222 has 24 divisors (see below), whose sum is σ = 2250172718976. Its totient is φ = 327960395856.

The previous prime is 1011211221217. The next prime is 1011211221277. The reversal of 1011211221222 is 2221221121101.

1011211221222 is a `hidden beast` number, since 1 + 0 + 11 + 211 + 221 + 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 = 1011211221195 and 1011211221204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 759166918 + ... + 759168249.

It is an arithmetic number, because the mean of its divisors is an integer number (93757196624).

Almost surely, 2^{1011211221222} is an apocalyptic number.

1011211221222 is an abundant number, since it is smaller than the sum of its proper divisors (1238961497754).

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

1011211221222 is a wasteful number, since it uses less digits than its factorization.

1011211221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518335212 (or 1518335209 counting only the distinct ones).

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

Adding to 1011211221222 its reverse (2221221121101), we get a palindrome (3232432342323).

The spelling of 1011211221222 in words is "one trillion, eleven billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twenty-two".