212001022021 has 8 divisors (see below), whose sum is σ = 217839982464. Its totient is φ = 206217407520.

The previous prime is 212001022019. The next prime is 212001022087. The reversal of 212001022021 is 120220100212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 212001022021 - 2¹ = 212001022019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212001021992 and 212001022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001022091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13828720 + ... + 13844041.

It is an arithmetic number, because the mean of its divisors is an integer number (27229997808).

Almost surely, 2^212001022021 is an apocalyptic number.

It is an amenable number.

212001022021 is a deficient number, since it is larger than the sum of its proper divisors (5838960443).

212001022021 is a wasteful number, since it uses less digits than its factorization.

212001022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27672971.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212001022021 its reverse (120220100212), we get a palindrome (332221122233).

The spelling of 212001022021 in words is "two hundred twelve billion, one million, twenty-two thousand, twenty-one".