61220212130 has 64 divisors (see below), whose sum is σ = 137423941632. Its totient is φ = 19076591040.

The previous prime is 61220212117. The next prime is 61220212147. The reversal of 61220212130 is 3121202216.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3816587 + ... + 3832593.

It is an arithmetic number, because the mean of its divisors is an integer number (2147249088).

Almost surely, 2^61220212130 is an apocalyptic number.

61220212130 is an abundant number, since it is smaller than the sum of its proper divisors (76203729502).

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

61220212130 is a wasteful number, since it uses less digits than its factorization.

61220212130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20999.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 61220212130 its reverse (3121202216), we get a palindrome (64341414346).

The spelling of 61220212130 in words is "sixty-one billion, two hundred twenty million, two hundred twelve thousand, one hundred thirty".