1210112200121 has 4 divisors (see below), whose sum is σ = 1320122400144. Its totient is φ = 1100102000100.

The previous prime is 1210112200039. The next prime is 1210112200123. The reversal of 1210112200121 is 1210022110121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1210112200121 - 2¹⁴ = 1210112183737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210112200096 and 1210112200105.

It is not an unprimeable number, because it can be changed into a prime (1210112200123) 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, 55005099995 + ... + 55005100016.

It is an arithmetic number, because the mean of its divisors is an integer number (330030600036).

Almost surely, 2^{1210112200121} is an apocalyptic number.

1210112200121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210112200121 is a deficient number, since it is larger than the sum of its proper divisors (110010200023).

1210112200121 is a wasteful number, since it uses less digits than its factorization.

1210112200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110010200022.

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

Adding to 1210112200121 its reverse (1210022110121), we get a palindrome (2420134310242).

The spelling of 1210112200121 in words is "one trillion, two hundred ten billion, one hundred twelve million, two hundred thousand, one hundred twenty-one".