221001210101121 has 8 divisors (see below), whose sum is σ = 295814849319264. Its totient is φ = 146760855475200.

The previous prime is 221001210101051. The next prime is 221001210101183. The reversal of 221001210101121 is 121101012100122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221001210101121 - 2¹¹ = 221001210099073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221001210101121.

It is not an unprimeable number, because it can be changed into a prime (221001210101821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143321147155 + ... + 143321148696.

It is an arithmetic number, because the mean of its divisors is an integer number (36976856164908).

Almost surely, 2^{221001210101121} is an apocalyptic number.

It is an amenable number.

221001210101121 is a deficient number, since it is larger than the sum of its proper divisors (74813639218143).

221001210101121 is a wasteful number, since it uses less digits than its factorization.

221001210101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286642296111.

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

Adding to 221001210101121 its reverse (121101012100122), we get a palindrome (342102222201243).

The spelling of 221001210101121 in words is "two hundred twenty-one trillion, one billion, two hundred ten million, one hundred one thousand, one hundred twenty-one".