121016213 has 2 divisors, whose sum is σ = 121016214. Its totient is φ = 121016212.

The previous prime is 121016171. The next prime is 121016227. The reversal of 121016213 is 312610121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72880369 + 48135844 = 8537^2 + 6938^2 .

It is a cyclic number.

It is not a de Polignac number, because 121016213 - 2¹⁸ = 120754069 is a prime.

It is a super-2 number, since 2×121016213² = 29289847617722738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121016191 and 121016200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121016243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60508106 + 60508107.

It is an arithmetic number, because the mean of its divisors is an integer number (60508107).

Almost surely, 2^121016213 is an apocalyptic number.

It is an amenable number.

121016213 is a deficient number, since it is larger than the sum of its proper divisors (1).

121016213 is an equidigital number, since it uses as much as digits as its factorization.

121016213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 121016213 is about 11000.7369298607. The cubic root of 121016213 is about 494.6308344996.

Adding to 121016213 its reverse (312610121), we get a palindrome (433626334).

The spelling of 121016213 in words is "one hundred twenty-one million, sixteen thousand, two hundred thirteen".