2101011201021 has 4 divisors (see below), whose sum is σ = 2801348268032. Its totient is φ = 1400674134012.

The previous prime is 2101011201011. The next prime is 2101011201067. The reversal of 2101011201021 is 1201021101012.

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 2101011201021 - 2⁶ = 2101011200957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2101011200988 and 2101011201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101011201011) 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, 350168533501 + ... + 350168533506.

It is an arithmetic number, because the mean of its divisors is an integer number (700337067008).

Almost surely, 2^{2101011201021} is an apocalyptic number.

It is an amenable number.

2101011201021 is a deficient number, since it is larger than the sum of its proper divisors (700337067011).

2101011201021 is an equidigital number, since it uses as much as digits as its factorization.

2101011201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700337067010.

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

Adding to 2101011201021 its reverse (1201021101012), we get a palindrome (3302032302033).

It can be divided in two parts, 2101011 and 201021, that added together give a palindrome (2302032).

The spelling of 2101011201021 in words is "two trillion, one hundred one billion, eleven million, two hundred one thousand, twenty-one".