101220744 has 16 divisors (see below), whose sum is σ = 253051920. Its totient is φ = 33740240.

The previous prime is 101220727. The next prime is 101220799. The reversal of 101220744 is 447022101.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 101220744.

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 in 3 ways as a sum of consecutive naturals, for example, 2108742 + ... + 2108789.

It is an arithmetic number, because the mean of its divisors is an integer number (15815745).

Almost surely, 2^101220744 is an apocalyptic number.

It is an amenable number.

101220744 is an abundant number, since it is smaller than the sum of its proper divisors (151831176).

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

101220744 is a wasteful number, since it uses less digits than its factorization.

101220744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4217540 (or 4217536 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 101220744 is about 10060.8520513921. The cubic root of 101220744 is about 466.0399801147.

Adding to 101220744 its reverse (447022101), we get a palindrome (548242845).

The spelling of 101220744 in words is "one hundred one million, two hundred twenty thousand, seven hundred forty-four".