221010101102121 has 16 divisors (see below), whose sum is σ = 315802917677184. Its totient is φ = 137124951093504.

The previous prime is 221010101102117. The next prime is 221010101102123. The reversal of 221010101102121 is 121201101010122.

It is a happy number.

It is not a de Polignac number, because 221010101102121 - 2² = 221010101102117 is a prime.

It is a super-3 number, since 3×221010101102121³ (a number of 44 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221010101102121.

It is not an unprimeable number, because it can be changed into a prime (221010101102123) 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, 43284388576 + ... + 43284393681.

It is an arithmetic number, because the mean of its divisors is an integer number (19737682354824).

Almost surely, 2^{221010101102121} is an apocalyptic number.

It is an amenable number.

221010101102121 is a deficient number, since it is larger than the sum of its proper divisors (94792816575063).

221010101102121 is a wasteful number, since it uses less digits than its factorization.

221010101102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86568782320.

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

Adding to 221010101102121 its reverse (121201101010122), we get a palindrome (342211202112243).

The spelling of 221010101102121 in words is "two hundred twenty-one trillion, ten billion, one hundred one million, one hundred two thousand, one hundred twenty-one".