101121012121 has 4 divisors (see below), whose sum is σ = 101122664500. Its totient is φ = 101119359744.

The previous prime is 101121012107. The next prime is 101121012149. The reversal of 101121012121 is 121210121101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53945172121 + 47175840000 = 232261^2 + 217200^2 .

It is a cyclic number.

It is not a de Polignac number, because 101121012121 - 2⁷ = 101121011993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101121012151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730716 + ... + 858013.

It is an arithmetic number, because the mean of its divisors is an integer number (25280666125).

Almost surely, 2^101121012121 is an apocalyptic number.

It is an amenable number.

101121012121 is a deficient number, since it is larger than the sum of its proper divisors (1652379).

101121012121 is an equidigital number, since it uses as much as digits as its factorization.

101121012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652378.

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

Adding to 101121012121 its reverse (121210121101), we get a palindrome (222331133222).

The spelling of 101121012121 in words is "one hundred one billion, one hundred twenty-one million, twelve thousand, one hundred twenty-one".