20120211001220 has 48 divisors (see below), whose sum is σ = 46093954386816. Its totient is φ = 7316380032000.

The previous prime is 20120211001169. The next prime is 20120211001223. The reversal of 20120211001220 is 2210011202102.

It is a super-2 number, since 2×20120211001220² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20120211001195 and 20120211001204.

It is not an unprimeable number, because it can be changed into a prime (20120211001223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33103865 + ... + 33706175.

It is an arithmetic number, because the mean of its divisors is an integer number (960290716392).

Almost surely, 2^{20120211001220} is an apocalyptic number.

20120211001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120211001220 is an abundant number, since it is smaller than the sum of its proper divisors (25973743385596).

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

20120211001220 is a wasteful number, since it uses less digits than its factorization.

20120211001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754172 (or 754170 counting only the distinct ones).

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

Adding to 20120211001220 its reverse (2210011202102), we get a palindrome (22330222203322).

The spelling of 20120211001220 in words is "twenty trillion, one hundred twenty billion, two hundred eleven million, one thousand, two hundred twenty".