61122044220 has 24 divisors (see below), whose sum is σ = 171141723984. Its totient is φ = 16299211776.

The previous prime is 61122044197. The next prime is 61122044231. The reversal of 61122044220 is 2244022116.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509350309 + ... + 509350428.

It is an arithmetic number, because the mean of its divisors is an integer number (7130905166).

Almost surely, 2^61122044220 is an apocalyptic number.

61122044220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61122044220 is an abundant number, since it is smaller than the sum of its proper divisors (110019679764).

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

61122044220 is a wasteful number, since it uses less digits than its factorization.

61122044220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018700749 (or 1018700747 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 61122044220 its reverse (2244022116), we get a palindrome (63366066336).

The spelling of 61122044220 in words is "sixty-one billion, one hundred twenty-two million, forty-four thousand, two hundred twenty".