212122002001 has 48 divisors (see below), whose sum is σ = 269948972160. Its totient is φ = 165179831040.

The previous prime is 212122001989. The next prime is 212122002031. The reversal of 212122002001 is 100200221212.

It is a happy number.

It is not a de Polignac number, because 212122002001 - 2¹⁵ = 212121969233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (212122002031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27991725 + ... + 27999301.

It is an arithmetic number, because the mean of its divisors is an integer number (5623936920).

Almost surely, 2^212122002001 is an apocalyptic number.

It is an amenable number.

212122002001 is a deficient number, since it is larger than the sum of its proper divisors (57826970159).

212122002001 is a wasteful number, since it uses less digits than its factorization.

212122002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8294 (or 8287 counting only the distinct ones).

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

Adding to 212122002001 its reverse (100200221212), we get a palindrome (312322223213).

The spelling of 212122002001 in words is "two hundred twelve billion, one hundred twenty-two million, two thousand, one".