101021212121 has 8 divisors (see below), whose sum is σ = 102800225088. Its totient is φ = 99257470000.

The previous prime is 101021212079. The next prime is 101021212129. The reversal of 101021212121 is 121212120101.

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

It is a cyclic number.

It is not a de Polignac number, because 101021212121 - 2⁶ = 101021212057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101021212096 and 101021212105.

It is not an unprimeable number, because it can be changed into a prime (101021212129) 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, 3804365 + ... + 3830826.

It is an arithmetic number, because the mean of its divisors is an integer number (12850028136).

Almost surely, 2^101021212121 is an apocalyptic number.

It is an amenable number.

101021212121 is a deficient number, since it is larger than the sum of its proper divisors (1779012967).

101021212121 is a wasteful number, since it uses less digits than its factorization.

101021212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7635423.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 101021212121 its reverse (121212120101), we get a palindrome (222233332222).

The spelling of 101021212121 in words is "one hundred one billion, twenty-one million, two hundred twelve thousand, one hundred twenty-one".