1211122020020 has 96 divisors (see below), whose sum is σ = 2855646130176. Its totient is φ = 427724035200.

The previous prime is 1211122019993. The next prime is 1211122020071. The reversal of 1211122020020 is 200202211121.

It is a junction number, because it is equal to n+sod(n) for n = 1211122019977 and 1211122020004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 467909 + ... + 1625171.

It is an arithmetic number, because the mean of its divisors is an integer number (29746313856).

Almost surely, 2^{1211122020020} is an apocalyptic number.

1211122020020 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 1211122020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1427823065088).

1211122020020 is an abundant number, since it is smaller than the sum of its proper divisors (1644524110156).

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

1211122020020 is a wasteful number, since it uses less digits than its factorization.

1211122020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157421 (or 1157419 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1211122020020 its reverse (200202211121), we get a palindrome (1411324231141).

The spelling of 1211122020020 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, twenty thousand, twenty".