1220101122220 has 24 divisors (see below), whose sum is σ = 2566172526624. Its totient is φ = 487286130816.

The previous prime is 1220101122211. The next prime is 1220101122313. The reversal of 1220101122220 is 222211010221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1220101122194 and 1220101122203.

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, 47131617 + ... + 47157496.

It is an arithmetic number, because the mean of its divisors is an integer number (106923855276).

Almost surely, 2^{1220101122220} is an apocalyptic number.

1220101122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220101122220 is an abundant number, since it is smaller than the sum of its proper divisors (1346071404404).

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

1220101122220 is a wasteful number, since it uses less digits than its factorization.

1220101122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94289769 (or 94289767 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220101122220 its reverse (222211010221), we get a palindrome (1442312132441).

The spelling of 1220101122220 in words is "one trillion, two hundred twenty billion, one hundred one million, one hundred twenty-two thousand, two hundred twenty".