1211020220112 has 40 divisors (see below), whose sum is σ = 3312496486656. Its totient is φ = 379927911936.

The previous prime is 1211020220107. The next prime is 1211020220143. The reversal of 1211020220112 is 2110220201121.

It is a junction number, because it is equal to n+sod(n) for n = 1211020220091 and 1211020220100.

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, 742045888 + ... + 742047519.

Almost surely, 2^{1211020220112} is an apocalyptic number.

1211020220112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211020220112 is an abundant number, since it is smaller than the sum of its proper divisors (2101476266544).

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

1211020220112 is a wasteful number, since it uses less digits than its factorization.

1211020220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484093435 (or 1484093429 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1211020220112 its reverse (2110220201121), we get a palindrome (3321240421233).

The spelling of 1211020220112 in words is "one trillion, two hundred eleven billion, twenty million, two hundred twenty thousand, one hundred twelve".