212121021001101 has 8 divisors (see below), whose sum is σ = 283404052500384. Its totient is φ = 141126001751280.

The previous prime is 212121021001081. The next prime is 212121021001117. The reversal of 212121021001101 is 101100120121212.

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 212121021001101 - 2¹⁷ = 212121020870029 is a prime.

It is a super-3 number, since 3×212121021001101³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121021002101) 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, 72003060646 + ... + 72003063591.

It is an arithmetic number, because the mean of its divisors is an integer number (35425506562548).

Almost surely, 2^{212121021001101} is an apocalyptic number.

It is an amenable number.

212121021001101 is a deficient number, since it is larger than the sum of its proper divisors (71283031499283).

212121021001101 is a wasteful number, since it uses less digits than its factorization.

212121021001101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144006124731.

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

Adding to 212121021001101 its reverse (101100120121212), we get a palindrome (313221141122313).

The spelling of 212121021001101 in words is "two hundred twelve trillion, one hundred twenty-one billion, twenty-one million, one thousand, one hundred one".