101220404 has 6 divisors (see below), whose sum is σ = 177135714. Its totient is φ = 50610200.

The previous prime is 101220377. The next prime is 101220421. The reversal of 101220404 is 404022101.

It can be written as a sum of positive squares in only one way, i.e., 78676900 + 22543504 = 8870^2 + 4748^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12652547 + ... + 12652554.

It is an arithmetic number, because the mean of its divisors is an integer number (29522619).

Almost surely, 2^101220404 is an apocalyptic number.

It is an amenable number.

101220404 is a deficient number, since it is larger than the sum of its proper divisors (75915310).

101220404 is a wasteful number, since it uses less digits than its factorization.

101220404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25305105 (or 25305103 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 101220404 is about 10060.8351542007. The cubic root of 101220404 is about 466.0394583054.

Adding to 101220404 its reverse (404022101), we get a palindrome (505242505).

The spelling of 101220404 in words is "one hundred one million, two hundred twenty thousand, four hundred four".