212000012001121 has 4 divisors (see below), whose sum is σ = 212000269605652. Its totient is φ = 211999754396592.

The previous prime is 212000012001073. The next prime is 212000012001313. The reversal of 212000012001121 is 121100210000212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23106874055521 + 188893137945600 = 4806961^2 + 13743840^2 .

It is a cyclic number.

It is not a de Polignac number, because 212000012001121 - 2¹⁹ = 212000011476833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212000012061121) 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, 127563846 + ... + 129215071.

It is an arithmetic number, because the mean of its divisors is an integer number (53000067401413).

Almost surely, 2^{212000012001121} is an apocalyptic number.

It is an amenable number.

212000012001121 is a deficient number, since it is larger than the sum of its proper divisors (257604531).

212000012001121 is an equidigital number, since it uses as much as digits as its factorization.

212000012001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257604530.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212000012001121 its reverse (121100210000212), we get a palindrome (333100222001333).

The spelling of 212000012001121 in words is "two hundred twelve trillion, twelve million, one thousand, one hundred twenty-one".