2021123829813 has 32 divisors (see below), whose sum is σ = 3004341964800. Its totient is φ = 1198322424000.

The previous prime is 2021123829793. The next prime is 2021123829827. The reversal of 2021123829813 is 3189283211202.

It is not a de Polignac number, because 2021123829813 - 2⁶ = 2021123829749 is a prime.

It is a super-2 number, since 2×2021123829813² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021123829113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3272113 + ... + 3840438.

It is an arithmetic number, because the mean of its divisors is an integer number (93885686400).

Almost surely, 2^{2021123829813} is an apocalyptic number.

It is an amenable number.

2021123829813 is a deficient number, since it is larger than the sum of its proper divisors (983218134987).

2021123829813 is a wasteful number, since it uses less digits than its factorization.

2021123829813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7112753.

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 2021123829813 in words is "two trillion, twenty-one billion, one hundred twenty-three million, eight hundred twenty-nine thousand, eight hundred thirteen".