1141021020 has 24 divisors (see below), whose sum is σ = 3194859024. Its totient is φ = 304272256.

The previous prime is 1141021019. The next prime is 1141021051. The reversal of 1141021020 is 201201411.

It is a happy number.

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 = 1141020987 and 1141021005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9508449 + ... + 9508568.

It is an arithmetic number, because the mean of its divisors is an integer number (133119126).

Almost surely, 2^1141021020 is an apocalyptic number.

1141021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1141021020 is an abundant number, since it is smaller than the sum of its proper divisors (2053838004).

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

1141021020 is a wasteful number, since it uses less digits than its factorization.

1141021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19017029 (or 19017027 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1141021020 is about 33779.0026495751. The cubic root of 1141021020 is about 1044.9557057910.

Adding to 1141021020 its reverse (201201411), we get a palindrome (1342222431).

The spelling of 1141021020 in words is "one billion, one hundred forty-one million, twenty-one thousand, twenty".