212122021001 has 16 divisors (see below), whose sum is σ = 232434045888. Its totient is φ = 191981836800.

The previous prime is 212122020973. The next prime is 212122021019. The reversal of 212122021001 is 100120221212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212122021001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212122021061) 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, 10999970 + ... + 11019236.

It is an arithmetic number, because the mean of its divisors is an integer number (14527127868).

Almost surely, 2^212122021001 is an apocalyptic number.

It is an amenable number.

212122021001 is a deficient number, since it is larger than the sum of its proper divisors (20312024887).

212122021001 is a wasteful number, since it uses less digits than its factorization.

212122021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23672.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212122021001 its reverse (100120221212), we get a palindrome (312242242213).

The spelling of 212122021001 in words is "two hundred twelve billion, one hundred twenty-two million, twenty-one thousand, one".