211212010202004 has 216 divisors, whose sum is σ = 650588357135808. Its totient is φ = 57497932800000.

The previous prime is 211212010201979. The next prime is 211212010202033. The reversal of 211212010202004 is 400202010212112.

It is a super-2 number, since 2×211212010202004² (a number of 29 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 298879 + ... + 20555129.

It is an arithmetic number, because the mean of its divisors is an integer number (3011983134888).

Almost surely, 2^{211212010202004} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211212010202004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325294178567904).

211212010202004 is an abundant number, since it is smaller than the sum of its proper divisors (439376346933804).

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

211212010202004 is a wasteful number, since it uses less digits than its factorization.

211212010202004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20256555 (or 20256543 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 211212010202004 its reverse (400202010212112), we get a palindrome (611414020414116).

The spelling of 211212010202004 in words is "two hundred eleven trillion, two hundred twelve billion, ten million, two hundred two thousand, four".