20000011121220 has 96 divisors (see below), whose sum is σ = 60768090472320. Its totient is φ = 4885498874880.

The previous prime is 20000011121213. The next prime is 20000011121221. The reversal of 20000011121220 is 2212111000002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20000011121196 and 20000011121205.

It is not an unprimeable number, because it can be changed into a prime (20000011121221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97764385 + ... + 97968744.

It is an arithmetic number, because the mean of its divisors is an integer number (633000942420).

Almost surely, 2^{20000011121220} is an apocalyptic number.

20000011121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20000011121220 is an abundant number, since it is smaller than the sum of its proper divisors (40768079351100).

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

20000011121220 is a wasteful number, since it uses less digits than its factorization.

20000011121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195733285 (or 195733283 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20000011121220 its reverse (2212111000002), we get a palindrome (22212122121222).

The spelling of 20000011121220 in words is "twenty trillion, eleven million, one hundred twenty-one thousand, two hundred twenty".