10122121000021 has 4 divisors (see below), whose sum is σ = 10122130662112. Its totient is φ = 10122111337932.

The previous prime is 10122121000009. The next prime is 10122121000031. The reversal of 10122121000021 is 12000012122101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10122121000021 - 2⁵ = 10122120999989 is a prime.

It is a super-2 number, since 2×10122121000021² (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 = 10122120999965 and 10122121000010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10122121000031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3037731 + ... + 5428816.

It is an arithmetic number, because the mean of its divisors is an integer number (2530532665528).

Almost surely, 2^{10122121000021} is an apocalyptic number.

It is an amenable number.

10122121000021 is a deficient number, since it is larger than the sum of its proper divisors (9662091).

10122121000021 is an equidigital number, since it uses as much as digits as its factorization.

10122121000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9662090.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10122121000021 its reverse (12000012122101), we get a palindrome (22122133122122).

The spelling of 10122121000021 in words is "ten trillion, one hundred twenty-two billion, one hundred twenty-one million, twenty-one", and thus it is an aban number.