212111210012004 has 36 divisors (see below), whose sum is σ = 536245980772684. Its totient is φ = 70693717635072.

The previous prime is 212111210011963. The next prime is 212111210012021. The reversal of 212111210012004 is 400210012111212.

It can be written as a sum of positive squares in 2 ways, for example, as 169523056090404 + 42588153921600 = 13020102^2 + 6525960^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 417202237 + ... + 417710340.

Almost surely, 2^{212111210012004} is an apocalyptic number.

It is an amenable number.

212111210012004 is an abundant number, since it is smaller than the sum of its proper divisors (324134770760680).

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

212111210012004 is a wasteful number, since it uses less digits than its factorization.

212111210012004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834919644 (or 834919639 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212111210012004 its reverse (400210012111212), we get a palindrome (612321222123216).

The spelling of 212111210012004 in words is "two hundred twelve trillion, one hundred eleven billion, two hundred ten million, twelve thousand, four".