10121564243 has 4 divisors (see below), whose sum is σ = 11567502000. Its totient is φ = 8675626488.

The previous prime is 10121564239. The next prime is 10121564273. The reversal of 10121564243 is 34246512101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34246512101 = 23 ⋅1488978787.

It is a cyclic number.

It is not a de Polignac number, because 10121564243 - 2² = 10121564239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10121564203) 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, 722968868 + ... + 722968881.

It is an arithmetic number, because the mean of its divisors is an integer number (2891875500).

Almost surely, 2^10121564243 is an apocalyptic number.

10121564243 is a deficient number, since it is larger than the sum of its proper divisors (1445937757).

10121564243 is an equidigital number, since it uses as much as digits as its factorization.

10121564243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445937756.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 10121564243 in words is "ten billion, one hundred twenty-one million, five hundred sixty-four thousand, two hundred forty-three".