1121210200121 has 12 divisors (see below), whose sum is σ = 1232455061796. Its totient is φ = 1019240265120.

The previous prime is 1121210200091. The next prime is 1121210200129. The reversal of 1121210200121 is 1210020121211.

It can be written as a sum of positive squares in 2 ways, for example, as 432411456400 + 688798743721 = 657580^2 + 829939^2 .

It is not a de Polignac number, because 1121210200121 - 2¹⁸ = 1121209937977 is a prime.

It is a super-2 number, since 2×1121210200121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121210200096 and 1121210200105.

It is not an unprimeable number, because it can be changed into a prime (1121210200129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2998091 + ... + 3351263.

It is an arithmetic number, because the mean of its divisors is an integer number (102704588483).

Almost surely, 2^{1121210200121} is an apocalyptic number.

1121210200121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121210200121 is a deficient number, since it is larger than the sum of its proper divisors (111244861675).

1121210200121 is a wasteful number, since it uses less digits than its factorization.

1121210200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379432 (or 379421 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1121210200121 its reverse (1210020121211), we get a palindrome (2331230321332).

The spelling of 1121210200121 in words is "one trillion, one hundred twenty-one billion, two hundred ten million, two hundred thousand, one hundred twenty-one".