210030000121 has 8 divisors (see below), whose sum is σ = 211678203464. Its totient is φ = 208387157760.

The previous prime is 210030000119. The next prime is 210030000137. The reversal of 210030000121 is 121000030012.

It can be written as a sum of positive squares in 4 ways, for example, as 57782544400 + 152247455721 = 240380^2 + 390189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210030000121 - 2¹ = 210030000119 is a prime.

It is a super-2 number, since 2×210030000121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210030000098 and 210030000107.

It is not an unprimeable number, because it can be changed into a prime (210030000161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1261566 + ... + 1418311.

It is an arithmetic number, because the mean of its divisors is an integer number (26459775433).

Almost surely, 2^210030000121 is an apocalyptic number.

It is an amenable number.

210030000121 is a deficient number, since it is larger than the sum of its proper divisors (1648203343).

210030000121 is a wasteful number, since it uses less digits than its factorization.

210030000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680491.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 210030000121 its reverse (121000030012), we get a palindrome (331030030133).

The spelling of 210030000121 in words is "two hundred ten billion, thirty million, one hundred twenty-one", and thus it is an aban number.