121203213 has 4 divisors (see below), whose sum is σ = 161604288. Its totient is φ = 80802140.

The previous prime is 121203193. The next prime is 121203347. The reversal of 121203213 is 312302121.

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 121203213 - 2⁹ = 121202701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121203192 and 121203201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121203113) 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, 20200533 + ... + 20200538.

It is an arithmetic number, because the mean of its divisors is an integer number (40401072).

Almost surely, 2^121203213 is an apocalyptic number.

It is an amenable number.

121203213 is a deficient number, since it is larger than the sum of its proper divisors (40401075).

121203213 is an equidigital number, since it uses as much as digits as its factorization.

121203213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40401074.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 121203213 is about 11009.2330795565. The cubic root of 121203213 is about 494.8854790677.

Adding to 121203213 its reverse (312302121), we get a palindrome (433505334).

The spelling of 121203213 in words is "one hundred twenty-one million, two hundred three thousand, two hundred thirteen".