121223033221 has 2 divisors, whose sum is σ = 121223033222. Its totient is φ = 121223033220.

The previous prime is 121223033209. The next prime is 121223033413. The reversal of 121223033221 is 122330322121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112080996225 + 9142036996 = 334785^2 + 95614^2 .

It is a cyclic number.

It is not a de Polignac number, because 121223033221 - 2⁵ = 121223033189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121223033192 and 121223033201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121223033021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611516610 + 60611516611.

It is an arithmetic number, because the mean of its divisors is an integer number (60611516611).

Almost surely, 2^121223033221 is an apocalyptic number.

It is an amenable number.

121223033221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121223033221 is an equidigital number, since it uses as much as digits as its factorization.

121223033221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 121223033221 its reverse (122330322121), we get a palindrome (243553355342).

The spelling of 121223033221 in words is "one hundred twenty-one billion, two hundred twenty-three million, thirty-three thousand, two hundred twenty-one".