1220120100011 has 16 divisors (see below), whose sum is σ = 1302735490560. Its totient is φ = 1139352298560.

The previous prime is 1220120099971. The next prime is 1220120100037. The reversal of 1220120100011 is 1100010210221.

It is a cyclic number.

It is not a de Polignac number, because 1220120100011 - 2²⁶ = 1220052991147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220120099965 and 1220120100001.

It is not an unprimeable number, because it can be changed into a prime (1220120100911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5691410 + ... + 5901896.

It is an arithmetic number, because the mean of its divisors is an integer number (81420968160).

Almost surely, 2^{1220120100011} is an apocalyptic number.

1220120100011 is a deficient number, since it is larger than the sum of its proper divisors (82615390549).

1220120100011 is a wasteful number, since it uses less digits than its factorization.

1220120100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214874.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1220120100011 its reverse (1100010210221), we get a palindrome (2320130310232).

The spelling of 1220120100011 in words is "one trillion, two hundred twenty billion, one hundred twenty million, one hundred thousand, eleven".