1212100201220 has 48 divisors (see below), whose sum is σ = 2582812915200. Its totient is φ = 477724007040.

The previous prime is 1212100201199. The next prime is 1212100201231. The reversal of 1212100201220 is 221020012121.

It is a junction number, because it is equal to n+sod(n) for n = 1212100201195 and 1212100201204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2114261 + ... + 2625699.

It is an arithmetic number, because the mean of its divisors is an integer number (53808602400).

Almost surely, 2^{1212100201220} is an apocalyptic number.

1212100201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212100201220 is an abundant number, since it is smaller than the sum of its proper divisors (1370712713980).

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

1212100201220 is a wasteful number, since it uses less digits than its factorization.

1212100201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513188 (or 513186 counting only the distinct ones).

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

Adding to 1212100201220 its reverse (221020012121), we get a palindrome (1433120213341).

The spelling of 1212100201220 in words is "one trillion, two hundred twelve billion, one hundred million, two hundred one thousand, two hundred twenty".