201122021011 has 4 divisors (see below), whose sum is σ = 201125049624. Its totient is φ = 201118992400.

The previous prime is 201122020997. The next prime is 201122021041. The reversal of 201122021011 is 110120221102.

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 201122021011 - 2⁹ = 201122020499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201122020982 and 201122021000.

It is not an unprimeable number, because it can be changed into a prime (201122021041) 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, 1412410 + ... + 1548271.

It is an arithmetic number, because the mean of its divisors is an integer number (50281262406).

Almost surely, 2^201122021011 is an apocalyptic number.

201122021011 is a deficient number, since it is larger than the sum of its proper divisors (3028613).

201122021011 is an equidigital number, since it uses as much as digits as its factorization.

201122021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3028612.

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

Adding to 201122021011 its reverse (110120221102), we get a palindrome (311242242113).

The spelling of 201122021011 in words is "two hundred one billion, one hundred twenty-two million, twenty-one thousand, eleven".