221111012212001 has 8 divisors (see below), whose sum is σ = 230810401511424. Its totient is φ = 211418778498400.

The previous prime is 221111012211959. The next prime is 221111012212031. The reversal of 221111012212001 is 100212210111122.

221111012212001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 221111012212001 - 2¹⁴ = 221111012195617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221111012212031) 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, 1788833300 + ... + 1788956901.

It is an arithmetic number, because the mean of its divisors is an integer number (28851300188928).

Almost surely, 2^{221111012212001} is an apocalyptic number.

It is an amenable number.

221111012212001 is a deficient number, since it is larger than the sum of its proper divisors (9699389299423).

221111012212001 is a wasteful number, since it uses less digits than its factorization.

221111012212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3577792911.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221111012212001 its reverse (100212210111122), we get a palindrome (321323222323123).

The spelling of 221111012212001 in words is "two hundred twenty-one trillion, one hundred eleven billion, twelve million, two hundred twelve thousand, one".