61220332212 has 96 divisors (see below), whose sum is σ = 163883973120. Its totient is φ = 17630524800.

The previous prime is 61220332207. The next prime is 61220332213. The reversal of 61220332212 is 21223302216.

It is a super-2 number, since 2×61220332212² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61220332213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121587 + ... + 370437.

It is an arithmetic number, because the mean of its divisors is an integer number (1707124720).

Almost surely, 2^61220332212 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 61220332212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81941986560).

61220332212 is an abundant number, since it is smaller than the sum of its proper divisors (102663640908).

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

61220332212 is a wasteful number, since it uses less digits than its factorization.

61220332212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248973 (or 248971 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 61220332212 its reverse (21223302216), we get a palindrome (82443634428).

The spelling of 61220332212 in words is "sixty-one billion, two hundred twenty million, three hundred thirty-two thousand, two hundred twelve".