1211210220112 has 40 divisors (see below), whose sum is σ = 2368774395680. Its totient is φ = 599916067200.

The previous prime is 1211210220071. The next prime is 1211210220173. The reversal of 1211210220112 is 2110220121121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8036683 + ... + 8186005.

It is an arithmetic number, because the mean of its divisors is an integer number (59219359892).

Almost surely, 2^{1211210220112} is an apocalyptic number.

It is an amenable number.

1211210220112 is a deficient number, since it is larger than the sum of its proper divisors (1157564175568).

1211210220112 is a wasteful number, since it uses less digits than its factorization.

1211210220112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154091 (or 154085 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1211210220112 its reverse (2110220121121), we get a palindrome (3321430341233).

The spelling of 1211210220112 in words is "one trillion, two hundred eleven billion, two hundred ten million, two hundred twenty thousand, one hundred twelve".