101211120121 has 4 divisors (see below), whose sum is σ = 106538021200. Its totient is φ = 95884219044.

The previous prime is 101211120113. The next prime is 101211120163. The reversal of 101211120121 is 121021112101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101211120121 - 2³ = 101211120113 is a prime.

It is a super-2 number, since 2×101211120121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101211124121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2663450511 + ... + 2663450548.

It is an arithmetic number, because the mean of its divisors is an integer number (26634505300).

Almost surely, 2^101211120121 is an apocalyptic number.

It is an amenable number.

101211120121 is a deficient number, since it is larger than the sum of its proper divisors (5326901079).

101211120121 is an equidigital number, since it uses as much as digits as its factorization.

101211120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5326901078.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101211120121 its reverse (121021112101), we get a palindrome (222232232222).

The spelling of 101211120121 in words is "one hundred one billion, two hundred eleven million, one hundred twenty thousand, one hundred twenty-one".