212002021 has 16 divisors (see below), whose sum is σ = 270764928. Its totient is φ = 161164800.

The previous prime is 212001983. The next prime is 212002027. The reversal of 212002021 is 120200212.

212002021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212002021 - 2²¹ = 209904869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212001989 and 212002007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212002027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30420 + ... + 36733.

It is an arithmetic number, because the mean of its divisors is an integer number (16922808).

Almost surely, 2^212002021 is an apocalyptic number.

It is an amenable number.

212002021 is a deficient number, since it is larger than the sum of its proper divisors (58762907).

212002021 is a wasteful number, since it uses less digits than its factorization.

212002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67212.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 212002021 is about 14560.2891798206. The cubic root of 212002021 is about 596.2750905296.

Adding to 212002021 its reverse (120200212), we get a palindrome (332202233).

The spelling of 212002021 in words is "two hundred twelve million, two thousand, twenty-one".