210212001121 has 4 divisors (see below), whose sum is σ = 212140551700. Its totient is φ = 208283450544.

The previous prime is 210212001073. The next prime is 210212001137. The reversal of 210212001121 is 121100212012.

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 180200250000 + 30011751121 = 424500^2 + 173239^2 .

It is a cyclic number.

It is not a de Polignac number, because 210212001121 - 2¹⁵ = 210211968353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210212001421) 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, 964275126 + ... + 964275343.

It is an arithmetic number, because the mean of its divisors is an integer number (53035137925).

Almost surely, 2^210212001121 is an apocalyptic number.

It is an amenable number.

210212001121 is a deficient number, since it is larger than the sum of its proper divisors (1928550579).

210212001121 is a wasteful number, since it uses less digits than its factorization.

210212001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928550578.

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

Adding to 210212001121 its reverse (121100212012), we get a palindrome (331312213133).

The spelling of 210212001121 in words is "two hundred ten billion, two hundred twelve million, one thousand, one hundred twenty-one".