101321220040 has 16 divisors (see below), whose sum is σ = 227972745180. Its totient is φ = 40528488000.

The previous prime is 101321220019. The next prime is 101321220059. The reversal of 101321220040 is 40022123101.

It can be written as a sum of positive squares in 2 ways, for example, as 99629872164 + 1691347876 = 315642^2 + 41126^2 .

It is a junction number, because it is equal to n+sod(n) for n = 101321219996 and 101321220023.

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, 1266515211 + ... + 1266515290.

Almost surely, 2^101321220040 is an apocalyptic number.

101321220040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101321220040 is an abundant number, since it is smaller than the sum of its proper divisors (126651525140).

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

101321220040 is a wasteful number, since it uses less digits than its factorization.

101321220040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533030512 (or 2533030508 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 101321220040 its reverse (40022123101), we get a palindrome (141343343141).

The spelling of 101321220040 in words is "one hundred one billion, three hundred twenty-one million, two hundred twenty thousand, forty".