221202100032121 has 64 divisors (see below), whose sum is σ = 242041776157440. Its totient is φ = 200944521722880.

The previous prime is 221202100032107. The next prime is 221202100032127. The reversal of 221202100032121 is 121230001202122.

It is not a de Polignac number, because 221202100032121 - 2⁴¹ = 219003076776569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221202100032127) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 151612130890 + ... + 151612132348.

It is an arithmetic number, because the mean of its divisors is an integer number (3781902752460).

Almost surely, 2^{221202100032121} is an apocalyptic number.

It is an amenable number.

221202100032121 is a deficient number, since it is larger than the sum of its proper divisors (20839676125319).

221202100032121 is a wasteful number, since it uses less digits than its factorization.

221202100032121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3146.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221202100032121 its reverse (121230001202122), we get a palindrome (342432101234243).

The spelling of 221202100032121 in words is "two hundred twenty-one trillion, two hundred two billion, one hundred million, thirty-two thousand, one hundred twenty-one".