211020012 has 48 divisors (see below), whose sum is σ = 625246720. Its totient is φ = 60291216.

The previous prime is 211020001. The next prime is 211020053. The reversal of 211020012 is 210020112.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 211019976 and 211020003.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138808 + ... + 140319.

Almost surely, 2^211020012 is an apocalyptic number.

It is an amenable number.

211020012 is an abundant number, since it is smaller than the sum of its proper divisors (414226708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211020012 is a wasteful number, since it uses less digits than its factorization.

211020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279147 (or 279139 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 211020012 is about 14526.5278714495. The cubic root of 211020012 is about 595.3530019316.

Adding to 211020012 its reverse (210020112), we get a palindrome (421040124).

It can be divided in two parts, 2110 and 20012, that added together give a palindrome (22122).

The spelling of 211020012 in words is "two hundred eleven million, twenty thousand, twelve".