10101212012121 has 8 divisors (see below), whose sum is σ = 13500273854784. Its totient is φ = 6718145755440.

The previous prime is 10101212012077. The next prime is 10101212012189. The reversal of 10101212012121 is 12121021210101.

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 10101212012121 - 2²¹ = 10101209914969 is a prime.

It is a super-2 number, since 2×10101212012121² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10101212012121.

It is not an unprimeable number, because it can be changed into a prime (10101212012321) 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, 3998895021 + ... + 3998897546.

It is an arithmetic number, because the mean of its divisors is an integer number (1687534231848).

Almost surely, 2^{10101212012121} is an apocalyptic number.

It is an amenable number.

10101212012121 is a deficient number, since it is larger than the sum of its proper divisors (3399061842663).

10101212012121 is an equidigital number, since it uses as much as digits as its factorization.

10101212012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7997792991.

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

Adding to 10101212012121 its reverse (12121021210101), we get a palindrome (22222233222222).

The spelling of 10101212012121 in words is "ten trillion, one hundred one billion, two hundred twelve million, twelve thousand, one hundred twenty-one".