2121231333101 has 4 divisors (see below), whose sum is σ = 2122503819072. Its totient is φ = 2119958847132.

The previous prime is 2121231333077. The next prime is 2121231333113. The reversal of 2121231333101 is 1013331321212.

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 2121231333101 - 2⁶ = 2121231333037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121231333181) 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, 636240485 + ... + 636243818.

It is an arithmetic number, because the mean of its divisors is an integer number (530625954768).

Almost surely, 2^{2121231333101} is an apocalyptic number.

It is an amenable number.

2121231333101 is a deficient number, since it is larger than the sum of its proper divisors (1272485971).

2121231333101 is a wasteful number, since it uses less digits than its factorization.

2121231333101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272485970.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 2121231333101 its reverse (1013331321212), we get a palindrome (3134562654313).

The spelling of 2121231333101 in words is "two trillion, one hundred twenty-one billion, two hundred thirty-one million, three hundred thirty-three thousand, one hundred one".