2121201031112 has 8 divisors (see below), whose sum is σ = 3977251933350. Its totient is φ = 1060600515552.

The previous prime is 2121201031111. The next prime is 2121201031129. The reversal of 2121201031112 is 2111301021212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1887782569156 + 233418461956 = 1373966^2 + 483134^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2121201031112² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121201031111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132575064437 + ... + 132575064452.

Almost surely, 2^{2121201031112} is an apocalyptic number.

It is an amenable number.

2121201031112 is a deficient number, since it is larger than the sum of its proper divisors (1856050902238).

2121201031112 is a wasteful number, since it uses less digits than its factorization.

2121201031112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265150128895 (or 265150128891 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2121201031112 its reverse (2111301021212), we get a palindrome (4232502052324).

The spelling of 2121201031112 in words is "two trillion, one hundred twenty-one billion, two hundred one million, thirty-one thousand, one hundred twelve".