201901220 has 48 divisors (see below), whose sum is σ = 457228800. Its totient is φ = 74638080.

The previous prime is 201901187. The next prime is 201901243. The reversal of 201901220 is 22109102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9101 + ... + 22059.

It is an arithmetic number, because the mean of its divisors is an integer number (9525600).

Almost surely, 2^201901220 is an apocalyptic number.

201901220 is a gapful number since it is divisible by the number (20) 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 201901220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228614400).

201901220 is an abundant number, since it is smaller than the sum of its proper divisors (255327580).

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

201901220 is a wasteful number, since it uses less digits than its factorization.

201901220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13028 (or 13026 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 201901220 is about 14209.1949103389. The cubic root of 201901220 is about 586.6507736454.

The spelling of 201901220 in words is "two hundred one million, nine hundred one thousand, two hundred twenty".