106221961 has 4 divisors (see below), whose sum is σ = 106898692. Its totient is φ = 105545232.

The previous prime is 106221959. The next prime is 106221971. The reversal of 106221961 is 169122601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48385936 + 57836025 = 6956^2 + 7605^2 .

It is a cyclic number.

It is not a de Polignac number, because 106221961 - 2¹ = 106221959 is a prime.

It is a super-2 number, since 2×106221961² = 22566209997371042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106221901) 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, 338130 + ... + 338443.

It is an arithmetic number, because the mean of its divisors is an integer number (26724673).

Almost surely, 2^106221961 is an apocalyptic number.

It is an amenable number.

106221961 is a deficient number, since it is larger than the sum of its proper divisors (676731).

106221961 is an equidigital number, since it uses as much as digits as its factorization.

106221961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676730.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 106221961 is about 10306.4038830234. The cubic root of 106221961 is about 473.5924514701.

The spelling of 106221961 in words is "one hundred six million, two hundred twenty-one thousand, nine hundred sixty-one".