10101012121 has 4 divisors (see below), whose sum is σ = 10201022244. Its totient is φ = 10001002000.

The previous prime is 10101012107. The next prime is 10101012151. The reversal of 10101012121 is 12121010101.

10101012121 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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 9331560000 + 769452121 = 96600^2 + 27739^2 .

It is a cyclic number.

It is not a de Polignac number, because 10101012121 - 2⁷ = 10101011993 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10101012098 and 10101012107.

It is not an unprimeable number, because it can be changed into a prime (10101012151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50004910 + ... + 50005111.

It is an arithmetic number, because the mean of its divisors is an integer number (2550255561).

Almost surely, 2^10101012121 is an apocalyptic number.

It is an amenable number.

10101012121 is a deficient number, since it is larger than the sum of its proper divisors (100010123).

10101012121 is a wasteful number, since it uses less digits than its factorization.

10101012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100010122.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10101012121 its reverse (12121010101), we get a palindrome (22222022222).

The spelling of 10101012121 in words is "ten billion, one hundred one million, twelve thousand, one hundred twenty-one".