16121045000 has 160 divisors (see below), whose sum is σ = 39825751680. Its totient is φ = 6103680000.

The previous prime is 16121044943. The next prime is 16121045063. The reversal of 16121045000 is 54012161.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11844320 + ... + 11845680.

It is an arithmetic number, because the mean of its divisors is an integer number (248910948).

Almost surely, 2^16121045000 is an apocalyptic number.

16121045000 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 16121045000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19912875840).

16121045000 is an abundant number, since it is smaller than the sum of its proper divisors (23704706680).

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

16121045000 is a wasteful number, since it uses less digits than its factorization.

16121045000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513 (or 1494 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 16121045000 its reverse (54012161), we get a palindrome (16175057161).

The spelling of 16121045000 in words is "sixteen billion, one hundred twenty-one million, forty-five thousand".