1121211210100 has 18 divisors (see below), whose sum is σ = 2433028326134. Its totient is φ = 448484484000.

The previous prime is 1121211210089. The next prime is 1121211210113. The reversal of 1121211210100 is 10121121211.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 244474869136 + 876736340964 = 494444^2 + 936342^2 .

It is a super-2 number, since 2×1121211210100² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5606055951 + ... + 5606056150.

Almost surely, 2^{1121211210100} is an apocalyptic number.

1121211210100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121211210100 is an abundant number, since it is smaller than the sum of its proper divisors (1311817116034).

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

1121211210100 is a wasteful number, since it uses less digits than its factorization.

1121211210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11212112115 (or 11212112108 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1121211210100 its reverse (10121121211), we get a palindrome (1131332331311).

The spelling of 1121211210100 in words is "one trillion, one hundred twenty-one billion, two hundred eleven million, two hundred ten thousand, one hundred".