121031213 has 4 divisors (see below), whose sum is σ = 121227360. Its totient is φ = 120835068.

The previous prime is 121031201. The next prime is 121031219. The reversal of 121031213 is 312130121.

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 121031213 - 2⁶ = 121031149 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 (121031219) 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, 97145 + ... + 98382.

It is an arithmetic number, because the mean of its divisors is an integer number (30306840).

Almost surely, 2^121031213 is an apocalyptic number.

It is an amenable number.

121031213 is a deficient number, since it is larger than the sum of its proper divisors (196147).

121031213 is an equidigital number, since it uses as much as digits as its factorization.

121031213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196146.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 121031213 is about 11001.4186812429. The cubic root of 121031213 is about 494.6512702077.

Adding to 121031213 its reverse (312130121), we get a palindrome (433161334).

It can be divided in two parts, 1210 and 31213, that added together give a palindrome (32423).

The spelling of 121031213 in words is "one hundred twenty-one million, thirty-one thousand, two hundred thirteen".