211220321001 has 16 divisors (see below), whose sum is σ = 288268498944. Its totient is φ = 137506373264.

The previous prime is 211220320963. The next prime is 211220321009. The reversal of 211220321001 is 100123022112.

It is a cyclic number.

It is not a de Polignac number, because 211220321001 - 2⁷ = 211220320873 is a prime.

It is a super-2 number, since 2×211220321001² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211220321009) 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, 1628301 + ... + 1753226.

It is an arithmetic number, because the mean of its divisors is an integer number (18016781184).

Almost surely, 2^211220321001 is an apocalyptic number.

It is an amenable number.

211220321001 is a deficient number, since it is larger than the sum of its proper divisors (77048177943).

211220321001 is a wasteful number, since it uses less digits than its factorization.

211220321001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3382020.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 211220321001 its reverse (100123022112), we get a palindrome (311343343113).

The spelling of 211220321001 in words is "two hundred eleven billion, two hundred twenty million, three hundred twenty-one thousand, one".