4420121000 has 64 divisors (see below), whose sum is σ = 10512786960. Its totient is φ = 1739040000.

The previous prime is 4420120981. The next prime is 4420121003. The reversal of 4420121000 is 1210244.

It can be written as a sum of positive squares in 8 ways, for example, as 236359876 + 4183761124 = 15374^2 + 64682^2 .

It is not an unprimeable number, because it can be changed into a prime (4420121003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24770 + ... + 97230.

Almost surely, 2^4420121000 is an apocalyptic number.

4420121000 is a gapful number since it is divisible by the number (40) 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 4420121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5256393480).

4420121000 is an abundant number, since it is smaller than the sum of its proper divisors (6092665960).

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

4420121000 is a wasteful number, since it uses less digits than its factorization.

4420121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72543 (or 72529 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 4420121000 is about 66483.9905541176. The cubic root of 4420121000 is about 1641.1365560027.

Adding to 4420121000 its reverse (1210244), we get a palindrome (4421331244).

The spelling of 4420121000 in words is "four billion, four hundred twenty million, one hundred twenty-one thousand".