202100121011 has 4 divisors (see below), whose sum is σ = 204535062312. Its totient is φ = 199665179712.

The previous prime is 202100120977. The next prime is 202100121031. The reversal of 202100121011 is 110121001202.

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 202100121011 - 2¹⁸ = 202099858867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202100120983 and 202100121001.

It is not an unprimeable number, because it can be changed into a prime (202100121031) 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, 1217470526 + ... + 1217470691.

It is an arithmetic number, because the mean of its divisors is an integer number (51133765578).

Almost surely, 2^202100121011 is an apocalyptic number.

202100121011 is a deficient number, since it is larger than the sum of its proper divisors (2434941301).

202100121011 is an equidigital number, since it uses as much as digits as its factorization.

202100121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434941300.

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

Adding to 202100121011 its reverse (110121001202), we get a palindrome (312221122213).

The spelling of 202100121011 in words is "two hundred two billion, one hundred million, one hundred twenty-one thousand, eleven".