2112202111421 has 2 divisors, whose sum is σ = 2112202111422. Its totient is φ = 2112202111420.

The previous prime is 2112202111399. The next prime is 2112202111451. The reversal of 2112202111421 is 1241112022112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1541225414521 + 570976696900 = 1241461^2 + 755630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112202111421 is a prime.

It is a super-2 number, since 2×2112202111421² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2112202111393 and 2112202111402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112202111451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056101055710 + 1056101055711.

It is an arithmetic number, because the mean of its divisors is an integer number (1056101055711).

Almost surely, 2^{2112202111421} is an apocalyptic number.

It is an amenable number.

2112202111421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112202111421 is an equidigital number, since it uses as much as digits as its factorization.

2112202111421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 2112202111421 its reverse (1241112022112), we get a palindrome (3353314133533).

The spelling of 2112202111421 in words is "two trillion, one hundred twelve billion, two hundred two million, one hundred eleven thousand, four hundred twenty-one".