2011210121021 has 4 divisors (see below), whose sum is σ = 2013888164544. Its totient is φ = 2008532077500.

The previous prime is 2011210120999. The next prime is 2011210121059. The reversal of 2011210121021 is 1201210121102.

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 2011210121021 - 2³⁰ = 2010136379197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011210120987 and 2011210121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011210121621) 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, 1339020635 + ... + 1339022136.

It is an arithmetic number, because the mean of its divisors is an integer number (503472041136).

Almost surely, 2^{2011210121021} is an apocalyptic number.

It is an amenable number.

2011210121021 is a deficient number, since it is larger than the sum of its proper divisors (2678043523).

2011210121021 is an equidigital number, since it uses as much as digits as its factorization.

2011210121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678043522.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2011210121021 its reverse (1201210121102), we get a palindrome (3212420242123).

The spelling of 2011210121021 in words is "two trillion, eleven billion, two hundred ten million, one hundred twenty-one thousand, twenty-one".