212010210121 has 4 divisors (see below), whose sum is σ = 212022350100. Its totient is φ = 211998070144.

The previous prime is 212010210119. The next prime is 212010210143. The reversal of 212010210121 is 121012010212.

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 89955005625 + 122055204496 = 299925^2 + 349364^2 .

It is a cyclic number.

It is not a de Polignac number, because 212010210121 - 2¹ = 212010210119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212010250121) 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, 6043756 + ... + 6078733.

It is an arithmetic number, because the mean of its divisors is an integer number (53005587525).

Almost surely, 2^212010210121 is an apocalyptic number.

It is an amenable number.

212010210121 is a deficient number, since it is larger than the sum of its proper divisors (12139979).

212010210121 is a wasteful number, since it uses less digits than its factorization.

212010210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12139978.

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

Adding to 212010210121 its reverse (121012010212), we get a palindrome (333022220333).

The spelling of 212010210121 in words is "two hundred twelve billion, ten million, two hundred ten thousand, one hundred twenty-one".