121213223101 has 4 divisors (see below), whose sum is σ = 125123327104. Its totient is φ = 117303119100.

The previous prime is 121213223093. The next prime is 121213223107. The reversal of 121213223101 is 101322312121.

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 121213223101 - 2³ = 121213223093 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 (121213223107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1955051955 + ... + 1955052016.

It is an arithmetic number, because the mean of its divisors is an integer number (31280831776).

Almost surely, 2^121213223101 is an apocalyptic number.

It is an amenable number.

121213223101 is a deficient number, since it is larger than the sum of its proper divisors (3910104003).

121213223101 is an equidigital number, since it uses as much as digits as its factorization.

121213223101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910104002.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121213223101 its reverse (101322312121), we get a palindrome (222535535222).

The spelling of 121213223101 in words is "one hundred twenty-one billion, two hundred thirteen million, two hundred twenty-three thousand, one hundred one".