1141121720 has 32 divisors (see below), whose sum is σ = 2580444000. Its totient is φ = 454151808.

The previous prime is 1141121713. The next prime is 1141121731. The reversal of 1141121720 is 271211411.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1141121692 and 1141121701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63719 + ... + 79638.

It is an arithmetic number, because the mean of its divisors is an integer number (80638875).

Almost surely, 2^1141121720 is an apocalyptic number.

1141121720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1141121720 is an abundant number, since it is smaller than the sum of its proper divisors (1439322280).

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

1141121720 is a wasteful number, since it uses less digits than its factorization.

1141121720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143567 (or 143563 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 1141121720 is about 33780.4931876372. The cubic root of 1141121720 is about 1044.9864454947.

The spelling of 1141121720 in words is "one billion, one hundred forty-one million, one hundred twenty-one thousand, seven hundred twenty".