1201111102020 has 192 divisors, whose sum is σ = 3539565840384. Its totient is φ = 303944970240.

The previous prime is 1201111102013. The next prime is 1201111102031. The reversal of 1201111102020 is 202011111021.

It is a super-6 number, since 6×1201111102020⁶ (a number of 74 digits) contains 666666 as substring.

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 = 1201111101987 and 1201111102005.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23464374 + ... + 23515506.

It is an arithmetic number, because the mean of its divisors is an integer number (18435238752).

Almost surely, 2^{1201111102020} is an apocalyptic number.

1201111102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201111102020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1769782920192).

1201111102020 is an abundant number, since it is smaller than the sum of its proper divisors (2338454738364).

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

1201111102020 is a wasteful number, since it uses less digits than its factorization.

1201111102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51422 (or 51420 counting only the distinct ones).

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

Adding to 1201111102020 its reverse (202011111021), we get a palindrome (1403122213041).

Subtracting from 1201111102020 its reverse (202011111021), we obtain a palindrome (999099990999).

The spelling of 1201111102020 in words is "one trillion, two hundred one billion, one hundred eleven million, one hundred two thousand, twenty".