2101211221013 has 4 divisors (see below), whose sum is σ = 2101594449408. Its totient is φ = 2100827992620.

The previous prime is 2101211221001. The next prime is 2101211221033. The reversal of 2101211221013 is 3101221121012.

It is a happy number.

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 2101211221013 - 2¹² = 2101211216917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101211220982 and 2101211221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101211221033) 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, 191605973 + ... + 191616938.

It is an arithmetic number, because the mean of its divisors is an integer number (525398612352).

Almost surely, 2^{2101211221013} is an apocalyptic number.

It is an amenable number.

2101211221013 is a deficient number, since it is larger than the sum of its proper divisors (383228395).

2101211221013 is an equidigital number, since it uses as much as digits as its factorization.

2101211221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383228394.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2101211221013 its reverse (3101221121012), we get a palindrome (5202432342025).

The spelling of 2101211221013 in words is "two trillion, one hundred one billion, two hundred eleven million, two hundred twenty-one thousand, thirteen".