212020617 has 16 divisors (see below), whose sum is σ = 304974720. Its totient is φ = 130520832.

The previous prime is 212020603. The next prime is 212020621. The reversal of 212020617 is 716020212.

It is not a de Polignac number, because 212020617 - 2⁷ = 212020489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212020593 and 212020602.

It is not an unprimeable number, because it can be changed into a prime (212020637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36517 + ... + 41922.

It is an arithmetic number, because the mean of its divisors is an integer number (19060920).

Almost surely, 2^212020617 is an apocalyptic number.

It is an amenable number.

212020617 is a deficient number, since it is larger than the sum of its proper divisors (92954103).

212020617 is a wasteful number, since it uses less digits than its factorization.

212020617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78512.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 212020617 is about 14560.9277520356. The cubic root of 212020617 is about 596.2925243372.

Adding to 212020617 its reverse (716020212), we get a palindrome (928040829).

The spelling of 212020617 in words is "two hundred twelve million, twenty thousand, six hundred seventeen".