1013111321220 has 72 divisors (see below), whose sum is σ = 3156161235864. Its totient is φ = 262861314048.

The previous prime is 1013111321219. The next prime is 1013111321237. The reversal of 1013111321220 is 221231113101.

1013111321220 is a `hidden beast` number, since 1 + 0 + 1 + 311 + 132 + 1 + 220 = 666.

1013111321220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 516492318276 + 496619002944 = 718674^2 + 704712^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1013111321193 and 1013111321202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76052749 + ... + 76066068.

Almost surely, 2^{1013111321220} is an apocalyptic number.

1013111321220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1013111321220 is an abundant number, since it is smaller than the sum of its proper divisors (2143049914644).

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

1013111321220 is a wasteful number, since it uses less digits than its factorization.

1013111321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152118869 (or 152118864 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1013111321220 its reverse (221231113101), we get a palindrome (1234342434321).

It can be divided in two parts, 1013111 and 321220, that added together give a palindrome (1334331).

The spelling of 1013111321220 in words is "one trillion, thirteen billion, one hundred eleven million, three hundred twenty-one thousand, two hundred twenty".