4261221000 has 128 divisors (see below), whose sum is σ = 14772326400. Its totient is φ = 1136318400.

The previous prime is 4261220993. The next prime is 4261221031. The reversal of 4261221000 is 1221624.

4261221000 is a `hidden beast` number, since 42 + 612 + 2 + 10 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51912 + ... + 105911.

It is an arithmetic number, because the mean of its divisors is an integer number (115408800).

Almost surely, 2^4261221000 is an apocalyptic number.

4261221000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4261221000 is an abundant number, since it is smaller than the sum of its proper divisors (10511105400).

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

4261221000 is a wasteful number, since it uses less digits than its factorization.

4261221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157853 (or 157833 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 4261221000 is about 65278.0284628756. The cubic root of 4261221000 is about 1621.2302041106.

Adding to 4261221000 its reverse (1221624), we get a palindrome (4262442624).

The spelling of 4261221000 in words is "four billion, two hundred sixty-one million, two hundred twenty-one thousand".