101221121102109 has 4 divisors (see below), whose sum is σ = 134961494802816. Its totient is φ = 67480747401404.

The previous prime is 101221121102099. The next prime is 101221121102137. The reversal of 101221121102109 is 901201121122101.

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 101221121102109 - 2⁷ = 101221121101981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221121107109) 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, 16870186850349 + ... + 16870186850354.

It is an arithmetic number, because the mean of its divisors is an integer number (33740373700704).

Almost surely, 2^{101221121102109} is an apocalyptic number.

It is an amenable number.

101221121102109 is a deficient number, since it is larger than the sum of its proper divisors (33740373700707).

101221121102109 is an equidigital number, since it uses as much as digits as its factorization.

101221121102109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33740373700706.

The product of its (nonzero) digits is 144, while the sum is 24.

The spelling of 101221121102109 in words is "one hundred one trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred two thousand, one hundred nine".