21221195 has 8 divisors (see below), whose sum is σ = 26805840. Its totient is φ = 16083360.

The previous prime is 21221171. The next prime is 21221237. The reversal of 21221195 is 59112212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21221195 - 2⁶ = 21221131 is a prime.

It is a super-3 number, since 3×21221195³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21221195.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111596 + ... + 111785.

It is an arithmetic number, because the mean of its divisors is an integer number (3350730).

Almost surely, 2^21221195 is an apocalyptic number.

21221195 is a deficient number, since it is larger than the sum of its proper divisors (5584645).

21221195 is a wasteful number, since it uses less digits than its factorization.

21221195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223405.

The product of its digits is 360, while the sum is 23.

The square root of 21221195 is about 4606.6468282255. The cubic root of 21221195 is about 276.8577034173.

The spelling of 21221195 in words is "twenty-one million, two hundred twenty-one thousand, one hundred ninety-five".