10012012021121 has 6 divisors (see below), whose sum is σ = 11004938833266. Its totient is φ = 9101829110000.

The previous prime is 10012012021051. The next prime is 10012012021133. The reversal of 10012012021121 is 12112021021001.

It can be written as a sum of positive squares in only one way, i.e., 9546122502400 + 465889518721 = 3089680^2 + 682561^2 .

It is not a de Polignac number, because 10012012021121 - 2³⁰ = 10010938279297 is a prime.

It is a super-2 number, since 2×10012012021121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10012012021096 and 10012012021105.

It is not an unprimeable number, because it can be changed into a prime (10012012021171) 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 5 ways as a sum of consecutive naturals, for example, 41371950380 + ... + 41371950621.

It is an arithmetic number, because the mean of its divisors is an integer number (1834156472211).

Almost surely, 2^{10012012021121} is an apocalyptic number.

10012012021121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10012012021121 is a deficient number, since it is larger than the sum of its proper divisors (992926812145).

10012012021121 is an equidigital number, since it uses as much as digits as its factorization.

10012012021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82743901023 (or 82743901012 counting only the distinct ones).

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

Adding to 10012012021121 its reverse (12112021021001), we get a palindrome (22124033042122).

The spelling of 10012012021121 in words is "ten trillion, twelve billion, twelve million, twenty-one thousand, one hundred twenty-one".