101000121220 has 24 divisors (see below), whose sum is σ = 212245689600. Its totient is φ = 40372346592.

The previous prime is 101000121197. The next prime is 101000121293. The reversal of 101000121220 is 22121000101.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 101000121197 and 101000121206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1701460 + ... + 1759819.

It is an arithmetic number, because the mean of its divisors is an integer number (8843570400).

Almost surely, 2^101000121220 is an apocalyptic number.

101000121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101000121220 is an abundant number, since it is smaller than the sum of its proper divisors (111245568380).

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

101000121220 is a wasteful number, since it uses less digits than its factorization.

101000121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3462747 (or 3462745 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 101000121220 its reverse (22121000101), we get a palindrome (123121121321).

The spelling of 101000121220 in words is "one hundred one billion, one hundred twenty-one thousand, two hundred twenty".