1101211021020 has 96 divisors (see below), whose sum is σ = 3380774132736. Its totient is φ = 265605088000.

The previous prime is 1101211021007. The next prime is 1101211021021. The reversal of 1101211021020 is 201201121011.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1101211020987 and 1101211021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101211021021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4104756 + ... + 4364795.

It is an arithmetic number, because the mean of its divisors is an integer number (35216397216).

Almost surely, 2^{1101211021020} is an apocalyptic number.

1101211021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101211021020 is an abundant number, since it is smaller than the sum of its proper divisors (2279563111716).

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

1101211021020 is a wasteful number, since it uses less digits than its factorization.

1101211021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8469771 (or 8469769 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1101211021020 its reverse (201201121011), we get a palindrome (1302412142031).

Subtracting from 1101211021020 its reverse (201201121011), we obtain a palindrome (900009900009).

The spelling of 1101211021020 in words is "one trillion, one hundred one billion, two hundred eleven million, twenty-one thousand, twenty".