212021163436 has 12 divisors (see below), whose sum is σ = 371197743840. Its totient is φ = 105964665200.

The previous prime is 212021163359. The next prime is 212021163463. The reversal of 212021163436 is 634361120212.

It is a junction number, because it is equal to n+sod(n) for n = 212021163398 and 212021163407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11468740 + ... + 11487211.

It is an arithmetic number, because the mean of its divisors is an integer number (30933145320).

Almost surely, 2^212021163436 is an apocalyptic number.

It is an amenable number.

212021163436 is a deficient number, since it is larger than the sum of its proper divisors (159176580404).

212021163436 is a wasteful number, since it uses less digits than its factorization.

212021163436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22958264 (or 22958262 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 212021163436 its reverse (634361120212), we get a palindrome (846382283648).

The spelling of 212021163436 in words is "two hundred twelve billion, twenty-one million, one hundred sixty-three thousand, four hundred thirty-six".