210121012 has 12 divisors (see below), whose sum is σ = 371503300. Its totient is φ = 103977216.

The previous prime is 210121001. The next prime is 210121063.

210121012 is nontrivially palindromic in base 10.

210121012 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 153660816 + 56460196 = 12396^2 + 7514^2 .

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 210121012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270387 + ... + 271162.

Almost surely, 2^210121012 is an apocalyptic number.

It is an amenable number.

210121012 is a deficient number, since it is larger than the sum of its proper divisors (161382288).

210121012 is a wasteful number, since it uses less digits than its factorization.

210121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541650 (or 541648 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 210121012 is about 14495.5514555328. The cubic root of 210121012 is about 594.5063457152.

The spelling of 210121012 in words is "two hundred ten million, one hundred twenty-one thousand, twelve".