212003421121 has 2 divisors, whose sum is σ = 212003421122. Its totient is φ = 212003421120.

The previous prime is 212003421061. The next prime is 212003421139. The reversal of 212003421121 is 121124300212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184259855025 + 27743566096 = 429255^2 + 166564^2 .

It is a cyclic number.

It is not a de Polignac number, because 212003421121 - 2¹¹ = 212003419073 is a prime.

It is not a weakly prime, because it can be changed into another prime (212003422121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106001710560 + 106001710561.

It is an arithmetic number, because the mean of its divisors is an integer number (106001710561).

Almost surely, 2^212003421121 is an apocalyptic number.

It is an amenable number.

212003421121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212003421121 is an equidigital number, since it uses as much as digits as its factorization.

212003421121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212003421121 its reverse (121124300212), we get a palindrome (333127721333).

The spelling of 212003421121 in words is "two hundred twelve billion, three million, four hundred twenty-one thousand, one hundred twenty-one".