212001002122021 has 8 divisors (see below), whose sum is σ = 243542231898944. Its totient is φ = 180773615427840.

The previous prime is 212001002121977. The next prime is 212001002122027. The reversal of 212001002122021 is 120221200100212.

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 212001002122021 - 2⁷ = 212001002121893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212001002121986 and 212001002122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001002122027) 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, 78460769235 + ... + 78460771936.

It is an arithmetic number, because the mean of its divisors is an integer number (30442778987368).

Almost surely, 2^{212001002122021} is an apocalyptic number.

It is an amenable number.

212001002122021 is a deficient number, since it is larger than the sum of its proper divisors (31541229776923).

212001002122021 is a wasteful number, since it uses less digits than its factorization.

212001002122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156921541371.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212001002122021 its reverse (120221200100212), we get a palindrome (332222202222233).

The spelling of 212001002122021 in words is "two hundred twelve trillion, one billion, two million, one hundred twenty-two thousand, twenty-one".