221220222011101 has 4 divisors (see below), whose sum is σ = 221232656418304. Its totient is φ = 221207787603900.

The previous prime is 221220222011093. The next prime is 221220222011137. The reversal of 221220222011101 is 101110222022122.

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 221220222011101 - 2³ = 221220222011093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220222014101) 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, 6217176915 + ... + 6217212496.

It is an arithmetic number, because the mean of its divisors is an integer number (55308164104576).

Almost surely, 2^{221220222011101} is an apocalyptic number.

It is an amenable number.

221220222011101 is a deficient number, since it is larger than the sum of its proper divisors (12434407203).

221220222011101 is a wasteful number, since it uses less digits than its factorization.

221220222011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12434407202.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221220222011101 its reverse (101110222022122), we get a palindrome (322330444033223).

The spelling of 221220222011101 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, eleven thousand, one hundred one".