10129721451 has 4 divisors (see below), whose sum is σ = 13506295272. Its totient is φ = 6753147632.

The previous prime is 10129721449. The next prime is 10129721453. The reversal of 10129721451 is 15412792101.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (10129721449) and next prime (10129721453).

It is a cyclic number.

It is not a de Polignac number, because 10129721451 - 2¹ = 10129721449 is a prime.

It is a super-2 number, since 2×10129721451² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10129721453) 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, 1688286906 + ... + 1688286911.

It is an arithmetic number, because the mean of its divisors is an integer number (3376573818).

Almost surely, 2^10129721451 is an apocalyptic number.

10129721451 is a deficient number, since it is larger than the sum of its proper divisors (3376573821).

10129721451 is an equidigital number, since it uses as much as digits as its factorization.

10129721451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3376573820.

The product of its (nonzero) digits is 5040, while the sum is 33.

The spelling of 10129721451 in words is "ten billion, one hundred twenty-nine million, seven hundred twenty-one thousand, four hundred fifty-one".