101221201020021 has 8 divisors (see below), whose sum is σ = 134996304795840. Its totient is φ = 67463448962112.

The previous prime is 101221201019999. The next prime is 101221201020029. The reversal of 101221201020021 is 120020102122101.

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

It is not a de Polignac number, because 101221201020021 - 2⁶ = 101221201019957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221201020029) 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, 4337915865 + ... + 4337939198.

It is an arithmetic number, because the mean of its divisors is an integer number (16874538099480).

Almost surely, 2^{101221201020021} is an apocalyptic number.

It is an amenable number.

101221201020021 is a deficient number, since it is larger than the sum of its proper divisors (33775103775819).

101221201020021 is an equidigital number, since it uses as much as digits as its factorization.

101221201020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8675858955.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 101221201020021 its reverse (120020102122101), we get a palindrome (221241303142122).

The spelling of 101221201020021 in words is "one hundred one trillion, two hundred twenty-one billion, two hundred one million, twenty thousand, twenty-one".