10021121133123 has 4 divisors (see below), whose sum is σ = 13361494844168. Its totient is φ = 6680747422080.

The previous prime is 10021121133091. The next prime is 10021121133143. The reversal of 10021121133123 is 32133112112001.

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

It is not a de Polignac number, because 10021121133123 - 2⁵ = 10021121133091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10021121133123.

It is not an unprimeable number, because it can be changed into a prime (10021121133143) 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, 1670186855518 + ... + 1670186855523.

It is an arithmetic number, because the mean of its divisors is an integer number (3340373711042).

Almost surely, 2^{10021121133123} is an apocalyptic number.

10021121133123 is a deficient number, since it is larger than the sum of its proper divisors (3340373711045).

10021121133123 is an equidigital number, since it uses as much as digits as its factorization.

10021121133123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340373711044.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 10021121133123 its reverse (32133112112001), we get a palindrome (42154233245124).

The spelling of 10021121133123 in words is "ten trillion, twenty-one billion, one hundred twenty-one million, one hundred thirty-three thousand, one hundred twenty-three".