10451021999 has 16 divisors (see below), whose sum is σ = 11541014784. Its totient is φ = 9384816000.

The previous prime is 10451021927. The next prime is 10451022011. The reversal of 10451021999 is 99912015401.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 10451021999 - 2²⁴ = 10434244783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10451521999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442832 + ... + 465834.

It is an arithmetic number, because the mean of its divisors is an integer number (721313424).

Almost surely, 2^10451021999 is an apocalyptic number.

10451021999 is a deficient number, since it is larger than the sum of its proper divisors (1089992785).

10451021999 is a wasteful number, since it uses less digits than its factorization.

10451021999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23518.

The product of its (nonzero) digits is 29160, while the sum is 41.

The spelling of 10451021999 in words is "ten billion, four hundred fifty-one million, twenty-one thousand, nine hundred ninety-nine".