101221121121 has 8 divisors (see below), whose sum is σ = 134965149024. Its totient is φ = 67478920320.

The previous prime is 101221121087. The next prime is 101221121143. The reversal of 101221121121 is 121121122101.

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 101221121121 - 2¹⁷ = 101220990049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101221121121.

It is not an unprimeable number, because it can be changed into a prime (101221121171) 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, 321811 + ... + 553176.

It is an arithmetic number, because the mean of its divisors is an integer number (16870643628).

Almost surely, 2^101221121121 is an apocalyptic number.

It is an amenable number.

101221121121 is a deficient number, since it is larger than the sum of its proper divisors (33744027903).

101221121121 is an equidigital number, since it uses as much as digits as its factorization.

101221121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913551.

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

Adding to 101221121121 its reverse (121121122101), we get a palindrome (222342243222).

The spelling of 101221121121 in words is "one hundred one billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".