220100121011 has 4 divisors (see below), whose sum is σ = 223385197512. Its totient is φ = 216815044512.

The previous prime is 220100120983. The next prime is 220100121029. The reversal of 220100121011 is 110121001022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220100121011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220100120983 and 220100121001.

It is not an unprimeable number, because it can be changed into a prime (220100121071) 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, 1642538150 + ... + 1642538283.

It is an arithmetic number, because the mean of its divisors is an integer number (55846299378).

Almost surely, 2^220100121011 is an apocalyptic number.

220100121011 is a deficient number, since it is larger than the sum of its proper divisors (3285076501).

220100121011 is an equidigital number, since it uses as much as digits as its factorization.

220100121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3285076500.

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

Adding to 220100121011 its reverse (110121001022), we get a palindrome (330221122033).

The spelling of 220100121011 in words is "two hundred twenty billion, one hundred million, one hundred twenty-one thousand, eleven".