10012112101021 has 4 divisors (see below), whose sum is σ = 10012119456700. Its totient is φ = 10012104745344.

The previous prime is 10012112101003. The next prime is 10012112101051. The reversal of 10012112101021 is 12010121121001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9776315424100 + 235796676921 = 3126710^2 + 485589^2 .

It is a cyclic number.

It is not a de Polignac number, because 10012112101021 - 2⁴¹ = 7813088845469 is a prime.

It is a super-2 number, since 2×10012112101021² (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 = 10012112100992 and 10012112101010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10012112101051) 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, 973086 + ... + 4579423.

It is an arithmetic number, because the mean of its divisors is an integer number (2503029864175).

Almost surely, 2^{10012112101021} is an apocalyptic number.

It is an amenable number.

10012112101021 is a deficient number, since it is larger than the sum of its proper divisors (7355679).

10012112101021 is an equidigital number, since it uses as much as digits as its factorization.

10012112101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7355678.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10012112101021 its reverse (12010121121001), we get a palindrome (22022233222022).

The spelling of 10012112101021 in words is "ten trillion, twelve billion, one hundred twelve million, one hundred one thousand, twenty-one".