212111002021 has 8 divisors (see below), whose sum is σ = 216728801280. Its totient is φ = 207497569488.

The previous prime is 212111001983. The next prime is 212111002067. The reversal of 212111002021 is 120200111212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212111002021 - 2¹⁵ = 212110969253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212111001992 and 212111002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111009021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 993381 + ... + 1187866.

It is an arithmetic number, because the mean of its divisors is an integer number (27091100160).

Almost surely, 2^212111002021 is an apocalyptic number.

It is an amenable number.

212111002021 is a deficient number, since it is larger than the sum of its proper divisors (4617799259).

212111002021 is a wasteful number, since it uses less digits than its factorization.

212111002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2183363.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212111002021 its reverse (120200111212), we get a palindrome (332311113233).

The spelling of 212111002021 in words is "two hundred twelve billion, one hundred eleven million, two thousand, twenty-one".