211220222010001 has 4 divisors (see below), whose sum is σ = 211230736252900. Its totient is φ = 211209707767104.

The previous prime is 211220222009963. The next prime is 211220222010013. The reversal of 211220222010001 is 100010222022112.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45419188869376 + 165801033140625 = 6739376^2 + 12876375^2 .

It is a cyclic number.

It is not a de Polignac number, because 211220222010001 - 2²⁵ = 211220188455569 is a prime.

It is a super-2 number, since 2×211220222010001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211220222010101) 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, 5257091316 + ... + 5257131493.

It is an arithmetic number, because the mean of its divisors is an integer number (52807684063225).

Almost surely, 2^{211220222010001} is an apocalyptic number.

It is an amenable number.

211220222010001 is a deficient number, since it is larger than the sum of its proper divisors (10514242899).

211220222010001 is a wasteful number, since it uses less digits than its factorization.

211220222010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10514242898.

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

Adding to 211220222010001 its reverse (100010222022112), we get a palindrome (311230444032113).

The spelling of 211220222010001 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred twenty-two million, ten thousand, one".