1121212101 has 32 divisors (see below), whose sum is σ = 1603628928. Its totient is φ = 694353920.

The previous prime is 1121212087. The next prime is 1121212109. The reversal of 1121212101 is 1012121211.

It is a cyclic number.

It is not a de Polignac number, because 1121212101 - 2¹¹ = 1121210053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121212109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1716691 + ... + 1717343.

It is an arithmetic number, because the mean of its divisors is an integer number (50113404).

Almost surely, 2^1121212101 is an apocalyptic number.

It is an amenable number.

1121212101 is a deficient number, since it is larger than the sum of its proper divisors (482416827).

1121212101 is a wasteful number, since it uses less digits than its factorization.

1121212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1121212101 is about 33484.5053868203. The cubic root of 1121212101 is about 1038.8733178818.

Adding to 1121212101 its reverse (1012121211), we get a palindrome (2133333312).

It can be divided in two parts, 112121210 and 1, that added together give a palindrome (112121211).

The spelling of 1121212101 in words is "one billion, one hundred twenty-one million, two hundred twelve thousand, one hundred one".