220001021101220 has 12 divisors (see below), whose sum is σ = 462002144312604. Its totient is φ = 88000408440480.

The previous prime is 220001021101157. The next prime is 220001021101259. The reversal of 220001021101220 is 22101120100022.

It can be written as a sum of positive squares in 2 ways, for example, as 24721022656576 + 195279998444644 = 4972024^2 + 13974262^2 .

It is a junction number, because it is equal to n+sod(n) for n = 220001021101195 and 220001021101204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5500025527511 + ... + 5500025527550.

It is an arithmetic number, because the mean of its divisors is an integer number (38500178692717).

Almost surely, 2^{220001021101220} is an apocalyptic number.

220001021101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220001021101220 is an abundant number, since it is smaller than the sum of its proper divisors (242001123211384).

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

220001021101220 is a wasteful number, since it uses less digits than its factorization.

220001021101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11000051055070 (or 11000051055068 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 220001021101220 its reverse (22101120100022), we get a palindrome (242102141201242).

The spelling of 220001021101220 in words is "two hundred twenty trillion, one billion, twenty-one million, one hundred one thousand, two hundred twenty".