1220102100220 has 24 divisors (see below), whose sum is σ = 2575490140944. Its totient is φ = 485512129536.

The previous prime is 1220102100193. The next prime is 1220102100241. The reversal of 1220102100220 is 220012010221.

It is a happy number.

It is a super-2 number, since 2×1220102100220² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220102100220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158040454 + ... + 158048173.

It is an arithmetic number, because the mean of its divisors is an integer number (107312089206).

Almost surely, 2^{1220102100220} is an apocalyptic number.

1220102100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220102100220 is an abundant number, since it is smaller than the sum of its proper divisors (1355388040724).

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

1220102100220 is a wasteful number, since it uses less digits than its factorization.

1220102100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316088829 (or 316088827 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1220102100220 its reverse (220012010221), we get a palindrome (1440114110441).

The spelling of 1220102100220 in words is "one trillion, two hundred twenty billion, one hundred two million, one hundred thousand, two hundred twenty".