212402001 has 16 divisors (see below), whose sum is σ = 324631424. Its totient is φ = 121008384.

The previous prime is 212401997. The next prime is 212402009. The reversal of 212402001 is 100204212.

It is not a de Polignac number, because 212402001 - 2² = 212401997 is a prime.

It is a super-3 number, since 3×212402001³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212402009) 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, 7930 + ... + 22083.

It is an arithmetic number, because the mean of its divisors is an integer number (20289464).

Almost surely, 2^212402001 is an apocalyptic number.

212402001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212402001 is a deficient number, since it is larger than the sum of its proper divisors (112229423).

212402001 is a wasteful number, since it uses less digits than its factorization.

212402001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30360.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 212402001 is about 14574.0180115162. The cubic root of 212402001 is about 596.6498484001.

Adding to 212402001 its reverse (100204212), we get a palindrome (312606213).

The spelling of 212402001 in words is "two hundred twelve million, four hundred two thousand, one".