212210001021 has 8 divisors (see below), whose sum is σ = 290593875424. Its totient is φ = 137649730320.

The previous prime is 212210001001. The next prime is 212210001103. The reversal of 212210001021 is 120100012212.

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

It is not a de Polignac number, because 212210001021 - 2²² = 212205806717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212210000988 and 212210001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212210001001) 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, 955900795 + ... + 955901016.

It is an arithmetic number, because the mean of its divisors is an integer number (36324234428).

Almost surely, 2^212210001021 is an apocalyptic number.

It is an amenable number.

212210001021 is a deficient number, since it is larger than the sum of its proper divisors (78383874403).

212210001021 is a wasteful number, since it uses less digits than its factorization.

212210001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911801851.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 212210001021 its reverse (120100012212), we get a palindrome (332310013233).

The spelling of 212210001021 in words is "two hundred twelve billion, two hundred ten million, one thousand, twenty-one".