101001211021220 has 12 divisors (see below), whose sum is σ = 212102543144604. Its totient is φ = 40400484408480.

The previous prime is 101001211021213. The next prime is 101001211021231. The reversal of 101001211021220 is 22120112100101.

It can be written as a sum of positive squares in 2 ways, for example, as 30515548231744 + 70485662789476 = 5524088^2 + 8395574^2 .

It is a junction number, because it is equal to n+sod(n) for n = 101001211021195 and 101001211021204.

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, 2525030275511 + ... + 2525030275550.

It is an arithmetic number, because the mean of its divisors is an integer number (17675211928717).

Almost surely, 2^{101001211021220} is an apocalyptic number.

101001211021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101001211021220 is an abundant number, since it is smaller than the sum of its proper divisors (111101332123384).

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

101001211021220 is a wasteful number, since it uses less digits than its factorization.

101001211021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050060551070 (or 5050060551068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 101001211021220 its reverse (22120112100101), we get a palindrome (123121323121321).

The spelling of 101001211021220 in words is "one hundred one trillion, one billion, two hundred eleven million, twenty-one thousand, two hundred twenty".