1220120001011 has 4 divisors (see below), whose sum is σ = 1228308726000. Its totient is φ = 1211931276024.

The previous prime is 1220120000999. The next prime is 1220120001013. The reversal of 1220120001011 is 1101000210221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220120001011 - 2¹⁸ = 1220119738867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220120000983 and 1220120001001.

It is not an unprimeable number, because it can be changed into a prime (1220120001013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4094362271 + ... + 4094362568.

It is an arithmetic number, because the mean of its divisors is an integer number (307077181500).

Almost surely, 2^{1220120001011} is an apocalyptic number.

1220120001011 is a deficient number, since it is larger than the sum of its proper divisors (8188724989).

1220120001011 is an equidigital number, since it uses as much as digits as its factorization.

1220120001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8188724988.

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

Adding to 1220120001011 its reverse (1101000210221), we get a palindrome (2321120211232).

The spelling of 1220120001011 in words is "one trillion, two hundred twenty billion, one hundred twenty million, one thousand, eleven".