1211202012112 has 20 divisors (see below), whose sum is σ = 2348288484516. Its totient is φ = 605192080640.

The previous prime is 1211202012091. The next prime is 1211202012143. The reversal of 1211202012112 is 2112102021121.

It can be written as a sum of positive squares in 2 ways, for example, as 380471846976 + 830730165136 = 616824^2 + 911444^2 .

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 3 ways as a sum of consecutive naturals, for example, 25533403 + ... + 25580794.

Almost surely, 2^{1211202012112} is an apocalyptic number.

It is an amenable number.

1211202012112 is a deficient number, since it is larger than the sum of its proper divisors (1137086472404).

1211202012112 is a wasteful number, since it uses less digits than its factorization.

1211202012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51115686 (or 51115680 counting only the distinct ones).

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

Adding to 1211202012112 its reverse (2112102021121), we get a palindrome (3323304033233).

Subtracting 1211202012112 from its reverse (2112102021121), we obtain a palindrome (900900009009).

The spelling of 1211202012112 in words is "one trillion, two hundred eleven billion, two hundred two million, twelve thousand, one hundred twelve".