213122001 has 8 divisors (see below), whose sum is σ = 286070400. Its totient is φ = 141127472.

The previous prime is 213121991. The next prime is 213122029. The reversal of 213122001 is 100221312.

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 213122001 - 2⁵ = 213121969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213122201) 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, 237945 + ... + 238838.

It is an arithmetic number, because the mean of its divisors is an integer number (35758800).

Almost surely, 2^213122001 is an apocalyptic number.

It is an amenable number.

213122001 is a deficient number, since it is larger than the sum of its proper divisors (72948399).

213122001 is a wasteful number, since it uses less digits than its factorization.

213122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476935.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 213122001 is about 14598.6986063827. The cubic root of 213122001 is about 597.3232623282.

Adding to 213122001 its reverse (100221312), we get a palindrome (313343313).

The spelling of 213122001 in words is "two hundred thirteen million, one hundred twenty-two thousand, one".