212111401 has 4 divisors (see below), whose sum is σ = 213730704. Its totient is φ = 210492100.

The previous prime is 212111399. The next prime is 212111437. The reversal of 212111401 is 104111212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212111401 - 2¹ = 212111399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212111101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809455 + ... + 809716.

It is an arithmetic number, because the mean of its divisors is an integer number (53432676).

Almost surely, 2^212111401 is an apocalyptic number.

It is an amenable number.

212111401 is a deficient number, since it is larger than the sum of its proper divisors (1619303).

212111401 is a wasteful number, since it uses less digits than its factorization.

212111401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619302.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 212111401 is about 14564.0448021832. The cubic root of 212111401 is about 596.3776199861.

Adding to 212111401 its reverse (104111212), we get a palindrome (316222613).

The spelling of 212111401 in words is "two hundred twelve million, one hundred eleven thousand, four hundred one".