80121381000 has 256 divisors, whose sum is σ = 253650009600. Its totient is φ = 21054080000.

The previous prime is 80121380993. The next prime is 80121381001. The reversal of 80121381000 is 18312108.

It is a super-2 number, since 2×80121381000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (80121381001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81506509 + ... + 81507491.

It is an arithmetic number, because the mean of its divisors is an integer number (990820350).

Almost surely, 2^80121381000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80121381000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126825004800).

80121381000 is an abundant number, since it is smaller than the sum of its proper divisors (173528628600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80121381000 is a wasteful number, since it uses less digits than its factorization.

80121381000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

Adding to 80121381000 its reverse (18312108), we get a palindrome (80139693108).

The spelling of 80121381000 in words is "eighty billion, one hundred twenty-one million, three hundred eighty-one thousand".