420121211 has 4 divisors (see below), whose sum is σ = 421489992. Its totient is φ = 418752432.

The previous prime is 420121171. The next prime is 420121249. The reversal of 420121211 is 112121024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420121211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420121511) 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, 683930 + ... + 684543.

It is an arithmetic number, because the mean of its divisors is an integer number (105372498).

Almost surely, 2^420121211 is an apocalyptic number.

420121211 is a deficient number, since it is larger than the sum of its proper divisors (1368781).

420121211 is a wasteful number, since it uses less digits than its factorization.

420121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368780.

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

The square root of 420121211 is about 20496.8585641800. The cubic root of 420121211 is about 748.9592741506.

Adding to 420121211 its reverse (112121024), we get a palindrome (532242235).

The spelling of 420121211 in words is "four hundred twenty million, one hundred twenty-one thousand, two hundred eleven".