1211140620 has 96 divisors (see below), whose sum is σ = 3787842240. Its totient is φ = 321269760.

The previous prime is 1211140607. The next prime is 1211140621. The reversal of 1211140620 is 260411121.

1211140620 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 1 + 40 + 620 = 666.

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 = 1211140593 and 1211140602.

It is not an unprimeable number, because it can be changed into a prime (1211140621) 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, 98410 + ... + 110030.

It is an arithmetic number, because the mean of its divisors is an integer number (39456690).

Almost surely, 2^1211140620 is an apocalyptic number.

1211140620 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 1211140620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1893921120).

1211140620 is an abundant number, since it is smaller than the sum of its proper divisors (2576701620).

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

1211140620 is a wasteful number, since it uses less digits than its factorization.

1211140620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11832 (or 11824 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1211140620 is about 34801.4456596274. The cubic root of 1211140620 is about 1065.9369655558.

Adding to 1211140620 its reverse (260411121), we get a palindrome (1471551741).

The spelling of 1211140620 in words is "one billion, two hundred eleven million, one hundred forty thousand, six hundred twenty".