220202121220 has 24 divisors (see below), whose sum is σ = 462449544984. Its totient is φ = 88076069376.

The previous prime is 220202121173. The next prime is 220202121221. The reversal of 220202121220 is 22121202022.

It can be written as a sum of positive squares in 4 ways, for example, as 11660112324 + 208542008896 = 107982^2 + 456664^2 .

It is a junction number, because it is equal to n+sod(n) for n = 220202121194 and 220202121203.

It is not an unprimeable number, because it can be changed into a prime (220202121221) 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, 91564 + ... + 669916.

It is an arithmetic number, because the mean of its divisors is an integer number (19268731041).

Almost surely, 2^220202121220 is an apocalyptic number.

220202121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220202121220 is an abundant number, since it is smaller than the sum of its proper divisors (242247423764).

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

220202121220 is a wasteful number, since it uses less digits than its factorization.

220202121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597399 (or 597397 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 220202121220 its reverse (22121202022), we get a palindrome (242323323242).

The spelling of 220202121220 in words is "two hundred twenty billion, two hundred two million, one hundred twenty-one thousand, two hundred twenty".