1211112021122 has 4 divisors (see below), whose sum is σ = 1816668031686. Its totient is φ = 605556010560.

The previous prime is 1211112021121. The next prime is 1211112021143. The reversal of 1211112021122 is 2211202111121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 857718629161 + 353393391961 = 926131^2 + 594469^2 .

It is a super-3 number, since 3×1211112021122³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211112021122.

It is not an unprimeable number, because it can be changed into a prime (1211112021121) by changing a digit.

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 as a sum of consecutive naturals, namely, 302778005279 + ... + 302778005282.

Almost surely, 2^{1211112021122} is an apocalyptic number.

1211112021122 is a deficient number, since it is larger than the sum of its proper divisors (605556010564).

1211112021122 is an equidigital number, since it uses as much as digits as its factorization.

1211112021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605556010563.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1211112021122 its reverse (2211202111121), we get a palindrome (3422314132243).

The spelling of 1211112021122 in words is "one trillion, two hundred eleven billion, one hundred twelve million, twenty-one thousand, one hundred twenty-two".