201011121021 has 4 divisors (see below), whose sum is σ = 268014828032. Its totient is φ = 134007414012.

The previous prime is 201011120987. The next prime is 201011121023. The reversal of 201011121021 is 120121110102.

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 not a de Polignac number, because 201011121021 - 2⁶ = 201011120957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201011120988 and 201011121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201011121023) 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, 33501853501 + ... + 33501853506.

It is an arithmetic number, because the mean of its divisors is an integer number (67003707008).

Almost surely, 2^201011121021 is an apocalyptic number.

It is an amenable number.

201011121021 is a deficient number, since it is larger than the sum of its proper divisors (67003707011).

201011121021 is an equidigital number, since it uses as much as digits as its factorization.

201011121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67003707010.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 201011121021 its reverse (120121110102), we get a palindrome (321132231123).

The spelling of 201011121021 in words is "two hundred one billion, eleven million, one hundred twenty-one thousand, twenty-one".