211420221001 has 4 divisors (see below), whose sum is σ = 230640241104. Its totient is φ = 192200200900.

The previous prime is 211420220981. The next prime is 211420221011. The reversal of 211420221001 is 100122024112.

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 a de Polignac number, because none of the positive numbers 2^k-211420221001 is a prime.

It is a super-2 number, since 2×211420221001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211420221011) 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, 9610010035 + ... + 9610010056.

It is an arithmetic number, because the mean of its divisors is an integer number (57660060276).

Almost surely, 2^211420221001 is an apocalyptic number.

It is an amenable number.

211420221001 is a deficient number, since it is larger than the sum of its proper divisors (19220020103).

211420221001 is a wasteful number, since it uses less digits than its factorization.

211420221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19220020102.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211420221001 its reverse (100122024112), we get a palindrome (311542245113).

The spelling of 211420221001 in words is "two hundred eleven billion, four hundred twenty million, two hundred twenty-one thousand, one".