120872221 has 4 divisors (see below), whose sum is σ = 122676352. Its totient is φ = 119068092.

The previous prime is 120872197. The next prime is 120872237. The reversal of 120872221 is 122278021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122278021 = 547 ⋅223543.

It is a cyclic number.

It is not a de Polignac number, because 120872221 - 2⁷ = 120872093 is a prime.

It is a super-2 number, since 2×120872221² = 29220187618945682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120872321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901965 + ... + 902098.

It is an arithmetic number, because the mean of its divisors is an integer number (30669088).

Almost surely, 2^120872221 is an apocalyptic number.

It is an amenable number.

120872221 is a deficient number, since it is larger than the sum of its proper divisors (1804131).

120872221 is an equidigital number, since it uses as much as digits as its factorization.

120872221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804130.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 120872221 is about 10994.1903294422. The cubic root of 120872221 is about 494.4345766363.

The spelling of 120872221 in words is "one hundred twenty million, eight hundred seventy-two thousand, two hundred twenty-one".