2101021202121 has 8 divisors (see below), whose sum is σ = 2830241619744. Its totient is φ = 1386240792960.

The previous prime is 2101021202117. The next prime is 2101021202123. The reversal of 2101021202121 is 1212021201012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2101021202121 - 2² = 2101021202117 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2101021202121.

It is not an unprimeable number, because it can be changed into a prime (2101021202123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3610001775 + ... + 3610002356.

It is an arithmetic number, because the mean of its divisors is an integer number (353780202468).

Almost surely, 2^{2101021202121} is an apocalyptic number.

It is an amenable number.

2101021202121 is a deficient number, since it is larger than the sum of its proper divisors (729220417623).

2101021202121 is an equidigital number, since it uses as much as digits as its factorization.

2101021202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7220004231.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2101021202121 its reverse (1212021201012), we get a palindrome (3313042403133).

The spelling of 2101021202121 in words is "two trillion, one hundred one billion, twenty-one million, two hundred two thousand, one hundred twenty-one".