101210440 has 16 divisors (see below), whose sum is σ = 227723580. Its totient is φ = 40484160.

The previous prime is 101210399. The next prime is 101210453. The reversal of 101210440 is 44012101.

It can be written as a sum of positive squares in 2 ways, for example, as 96707556 + 4502884 = 9834^2 + 2122^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 101210440.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1265091 + ... + 1265170.

Almost surely, 2^101210440 is an apocalyptic number.

101210440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101210440 is an abundant number, since it is smaller than the sum of its proper divisors (126513140).

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

101210440 is a wasteful number, since it uses less digits than its factorization.

101210440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2530272 (or 2530268 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 101210440 is about 10060.3399544946. The cubic root of 101210440 is about 466.0241657051.

Adding to 101210440 its reverse (44012101), we get a palindrome (145222541).

The spelling of 101210440 in words is "one hundred one million, two hundred ten thousand, four hundred forty".