61021120 has 56 divisors (see below), whose sum is σ = 148882608. Its totient is φ = 23808000.

The previous prime is 61021111. The next prime is 61021127. The reversal of 61021120 is 2112016.

It is a self number, because there is not a number n which added to its sum of digits gives 61021120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61021127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10795 + ... + 15445.

It is an arithmetic number, because the mean of its divisors is an integer number (2658618).

Almost surely, 2^61021120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74441304).

61021120 is an abundant number, since it is smaller than the sum of its proper divisors (87861488).

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

61021120 is a wasteful number, since it uses less digits than its factorization.

61021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709 (or 4699 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 61021120 is about 7811.6016283474. The cubic root of 61021120 is about 393.6951441175.

Adding to 61021120 its reverse (2112016), we get a palindrome (63133136).

The spelling of 61021120 in words is "sixty-one million, twenty-one thousand, one hundred twenty".