101311211220 has 48 divisors (see below), whose sum is σ = 283706998848. Its totient is φ = 27012931840.

The previous prime is 101311211201. The next prime is 101311211231. The reversal of 101311211220 is 22112113101.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 101311211220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 395632 + ... + 599288.

It is an arithmetic number, because the mean of its divisors is an integer number (5910562476).

Almost surely, 2^101311211220 is an apocalyptic number.

101311211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101311211220 is an abundant number, since it is smaller than the sum of its proper divisors (182395787628).

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

101311211220 is a wasteful number, since it uses less digits than its factorization.

101311211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211960 (or 211958 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 101311211220 its reverse (22112113101), we get a palindrome (123423324321).

The spelling of 101311211220 in words is "one hundred one billion, three hundred eleven million, two hundred eleven thousand, two hundred twenty".