2121201033101 has 4 divisors (see below), whose sum is σ = 2121430634400. Its totient is φ = 2120971431804.

The previous prime is 2121201033089. The next prime is 2121201033109. The reversal of 2121201033101 is 1013301021212.

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 2121201033101 - 2²² = 2121196838797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121201033101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121201033109) 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, 114786791 + ... + 114805268.

It is an arithmetic number, because the mean of its divisors is an integer number (530357658600).

Almost surely, 2^{2121201033101} is an apocalyptic number.

It is an amenable number.

2121201033101 is a deficient number, since it is larger than the sum of its proper divisors (229601299).

2121201033101 is an equidigital number, since it uses as much as digits as its factorization.

2121201033101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229601298.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 2121201033101 its reverse (1013301021212), we get a palindrome (3134502054313).

The spelling of 2121201033101 in words is "two trillion, one hundred twenty-one billion, two hundred one million, thirty-three thousand, one hundred one".