10120001212021 has 4 divisors (see below), whose sum is σ = 10120008323692. Its totient is φ = 10119994100352.

The previous prime is 10120001212001. The next prime is 10120001212063. The reversal of 10120001212021 is 12021210002101.

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 8839686331921 + 1280314880100 = 2973161^2 + 1131510^2 .

It is a cyclic number.

It is not a de Polignac number, because 10120001212021 - 2¹⁷ = 10120001080949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10120001211992 and 10120001212010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120001212001) 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, 605130 + ... + 4539403.

It is an arithmetic number, because the mean of its divisors is an integer number (2530002080923).

Almost surely, 2^{10120001212021} is an apocalyptic number.

It is an amenable number.

10120001212021 is a deficient number, since it is larger than the sum of its proper divisors (7111671).

10120001212021 is an equidigital number, since it uses as much as digits as its factorization.

10120001212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7111670.

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

Adding to 10120001212021 its reverse (12021210002101), we get a palindrome (22141211214122).

The spelling of 10120001212021 in words is "ten trillion, one hundred twenty billion, one million, two hundred twelve thousand, twenty-one".