101221211121 has 8 divisors (see below), whose sum is σ = 134983168320. Its totient is φ = 67470030672.

The previous prime is 101221211101. The next prime is 101221211159. The reversal of 101221211121 is 121112122101.

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 101221211121 - 2³⁰ = 100147469297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101221211121.

It is not an unprimeable number, because it can be changed into a prime (101221211101) 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, 2672245 + ... + 2709858.

It is an arithmetic number, because the mean of its divisors is an integer number (16872896040).

Almost surely, 2^101221211121 is an apocalyptic number.

It is an amenable number.

101221211121 is a deficient number, since it is larger than the sum of its proper divisors (33761957199).

101221211121 is an equidigital number, since it uses as much as digits as its factorization.

101221211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5388375.

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

Adding to 101221211121 its reverse (121112122101), we get a palindrome (222333333222).

The spelling of 101221211121 in words is "one hundred one billion, two hundred twenty-one million, two hundred eleven thousand, one hundred twenty-one".