121442213 has 2 divisors, whose sum is σ = 121442214. Its totient is φ = 121442212.

The previous prime is 121442201. The next prime is 121442263. The reversal of 121442213 is 312244121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68923204 + 52519009 = 8302^2 + 7247^2 .

It is a cyclic number.

It is not a de Polignac number, because 121442213 - 2⁶ = 121442149 is a prime.

It is a super-2 number, since 2×121442213² = 29496422196674738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121442263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60721106 + 60721107.

It is an arithmetic number, because the mean of its divisors is an integer number (60721107).

Almost surely, 2^121442213 is an apocalyptic number.

It is an amenable number.

121442213 is a deficient number, since it is larger than the sum of its proper divisors (1).

121442213 is an equidigital number, since it uses as much as digits as its factorization.

121442213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 20.

The square root of 121442213 is about 11020.0822592211. The cubic root of 121442213 is about 495.2105528781.

Adding to 121442213 its reverse (312244121), we get a palindrome (433686334).

The spelling of 121442213 in words is "one hundred twenty-one million, four hundred forty-two thousand, two hundred thirteen".