221210101100121 has 16 divisors (see below), whose sum is σ = 338528762941824. Its totient is φ = 125863258011264.

The previous prime is 221210101100113. The next prime is 221210101100123. The reversal of 221210101100121 is 121001101012122.

It is a happy number.

It is not a de Polignac number, because 221210101100121 - 2³ = 221210101100113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221210101100121.

It is not an unprimeable number, because it can be changed into a prime (221210101100123) 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, 22604746906 + ... + 22604756691.

It is an arithmetic number, because the mean of its divisors is an integer number (21158047683864).

Almost surely, 2^{221210101100121} is an apocalyptic number.

221210101100121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221210101100121 is a deficient number, since it is larger than the sum of its proper divisors (117318661841703).

221210101100121 is a wasteful number, since it uses less digits than its factorization.

221210101100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45209503840.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221210101100121 its reverse (121001101012122), we get a palindrome (342211202112243).

The spelling of 221210101100121 in words is "two hundred twenty-one trillion, two hundred ten billion, one hundred one million, one hundred thousand, one hundred twenty-one".