201122001211021 has 4 divisors (see below), whose sum is σ = 219405819502944. Its totient is φ = 182838182919100.

The previous prime is 201122001211007. The next prime is 201122001211069. The reversal of 201122001211021 is 120112100221102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201122001211021 - 2⁹ = 201122001210509 is a prime.

It is a super-2 number, since 2×201122001211021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201122001210986 and 201122001211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201122001217021) 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, 9141909145945 + ... + 9141909145966.

It is an arithmetic number, because the mean of its divisors is an integer number (54851454875736).

Almost surely, 2^{201122001211021} is an apocalyptic number.

It is an amenable number.

201122001211021 is a deficient number, since it is larger than the sum of its proper divisors (18283818291923).

201122001211021 is a wasteful number, since it uses less digits than its factorization.

201122001211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18283818291922.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201122001211021 its reverse (120112100221102), we get a palindrome (321234101432123).

The spelling of 201122001211021 in words is "two hundred one trillion, one hundred twenty-two billion, one million, two hundred eleven thousand, twenty-one".