221220302100001 has 4 divisors (see below), whose sum is σ = 221220413625904. Its totient is φ = 221220190574100.

The previous prime is 221220302099957. The next prime is 221220302100047. The reversal of 221220302100001 is 100001203022122.

It is a happy number.

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 221220302100001 - 2¹¹ = 221220302097953 is a prime.

It is a super-2 number, since 2×221220302100001² (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 (221220302100101) 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, 52732695 + ... + 56773036.

It is an arithmetic number, because the mean of its divisors is an integer number (55305103406476).

Almost surely, 2^{221220302100001} is an apocalyptic number.

It is an amenable number.

221220302100001 is a deficient number, since it is larger than the sum of its proper divisors (111525903).

221220302100001 is a wasteful number, since it uses less digits than its factorization.

221220302100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111525902.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 221220302100001 its reverse (100001203022122), we get a palindrome (321221505122123).

The spelling of 221220302100001 in words is "two hundred twenty-one trillion, two hundred twenty billion, three hundred two million, one hundred thousand, one".