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 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.
Almost surely, 2210121012 is an apocalyptic number.
It is an amenable number.
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 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".