10121320000 has 140 divisors (see below), whose sum is σ = 27380372976. Its totient is φ = 3680320000.

The previous prime is 10121319979. The next prime is 10121320003. The reversal of 10121320000 is 2312101.

It is a super-2 number, since 2×10121320000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (10121320003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 428499 + ... + 451501.

Almost surely, 2^10121320000 is an apocalyptic number.

10121320000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10121320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13690186488).

10121320000 is an abundant number, since it is smaller than the sum of its proper divisors (17259052976).

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

10121320000 is an equidigital number, since it uses as much as digits as its factorization.

10121320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23046 (or 23021 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 10121320000 its reverse (2312101), we get a palindrome (10123632101).

The spelling of 10121320000 in words is "ten billion, one hundred twenty-one million, three hundred twenty thousand".