1220120201011 has 4 divisors (see below), whose sum is σ = 1220134879872. Its totient is φ = 1220105522152.

The previous prime is 1220120201009. The next prime is 1220120201017. The reversal of 1220120201011 is 1101020210221.

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 1220120201011 - 2¹ = 1220120201009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220120200982 and 1220120201000.

It is not an unprimeable number, because it can be changed into a prime (1220120201017) 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 3 ways as a sum of consecutive naturals, for example, 7214035 + ... + 7381228.

It is an arithmetic number, because the mean of its divisors is an integer number (305033719968).

Almost surely, 2^{1220120201011} is an apocalyptic number.

1220120201011 is a deficient number, since it is larger than the sum of its proper divisors (14678861).

1220120201011 is an equidigital number, since it uses as much as digits as its factorization.

1220120201011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14678860.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1220120201011 its reverse (1101020210221), we get a palindrome (2321140411232).

The spelling of 1220120201011 in words is "one trillion, two hundred twenty billion, one hundred twenty million, two hundred one thousand, eleven".