221021101012001 has 8 divisors (see below), whose sum is σ = 228219804321024. Its totient is φ = 213826709601360.

The previous prime is 221021101011937. The next prime is 221021101012013. The reversal of 221021101012001 is 100210101120122.

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 221021101012001 - 2⁶ = 221021101011937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221021101012501) 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, 1077870410 + ... + 1078075443.

It is an arithmetic number, because the mean of its divisors is an integer number (28527475540128).

Almost surely, 2^{221021101012001} is an apocalyptic number.

It is an amenable number.

221021101012001 is a deficient number, since it is larger than the sum of its proper divisors (7198703309023).

221021101012001 is a wasteful number, since it uses less digits than its factorization.

221021101012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155949191.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221021101012001 its reverse (100210101120122), we get a palindrome (321231202132123).

The spelling of 221021101012001 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred one million, twelve thousand, one".