1211200112 has 20 divisors (see below), whose sum is σ = 2351326440. Its totient is φ = 604406208.

The previous prime is 1211200091. The next prime is 1211200117. The reversal of 1211200112 is 2110021121.

It is a super-2 number, since 2×1211200112² = 2934011422617625088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211200093 and 1211200102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211200117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66218 + ... + 82505.

It is an arithmetic number, because the mean of its divisors is an integer number (117566322).

Almost surely, 2^1211200112 is an apocalyptic number.

It is an amenable number.

1211200112 is a deficient number, since it is larger than the sum of its proper divisors (1140126328).

1211200112 is a wasteful number, since it uses less digits than its factorization.

1211200112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149240 (or 149234 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1211200112 is about 34802.3003837390. The cubic root of 1211200112 is about 1065.9544184380.

Adding to 1211200112 its reverse (2110021121), we get a palindrome (3321221233).

The spelling of 1211200112 in words is "one billion, two hundred eleven million, two hundred thousand, one hundred twelve".