10121420215 has 4 divisors (see below), whose sum is σ = 12145704264. Its totient is φ = 8097136168.

The previous prime is 10121420207. The next prime is 10121420219. The reversal of 10121420215 is 51202412101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51202412101 = 6869 ⋅7454129.

It is a cyclic number.

It is not a de Polignac number, because 10121420215 - 2³ = 10121420207 is a prime.

It is a super-2 number, since 2×10121420215² (a number of 21 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 = 10121420192 and 10121420201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121420219) 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 3 ways as a sum of consecutive naturals, for example, 1012142017 + ... + 1012142026.

It is an arithmetic number, because the mean of its divisors is an integer number (3036426066).

Almost surely, 2^10121420215 is an apocalyptic number.

10121420215 is a deficient number, since it is larger than the sum of its proper divisors (2024284049).

10121420215 is an equidigital number, since it uses as much as digits as its factorization.

10121420215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024284048.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 10121420215 its reverse (51202412101), we get a palindrome (61323832316).

It can be divided in two parts, 10121 and 420215, that added together give a square (430336 = 656²).

The spelling of 10121420215 in words is "ten billion, one hundred twenty-one million, four hundred twenty thousand, two hundred fifteen".