121012231 has 4 divisors (see below), whose sum is σ = 121072464. Its totient is φ = 120952000.

The previous prime is 121012219. The next prime is 121012249. The reversal of 121012231 is 132210121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132210121 = 541 ⋅244381.

It is a cyclic number.

It is not a de Polignac number, because 121012231 - 2²¹ = 118915079 is a prime.

It is a super-2 number, since 2×121012231² = 29287920103194722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26995 + ... + 31156.

It is an arithmetic number, because the mean of its divisors is an integer number (30268116).

Almost surely, 2^121012231 is an apocalyptic number.

121012231 is a deficient number, since it is larger than the sum of its proper divisors (60233).

121012231 is an equidigital number, since it uses as much as digits as its factorization.

121012231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60232.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 121012231 is about 11000.5559404968. Note that the first 3 decimals coincide. The cubic root of 121012231 is about 494.6254092167.

Adding to 121012231 its reverse (132210121), we get a palindrome (253222352).

The spelling of 121012231 in words is "one hundred twenty-one million, twelve thousand, two hundred thirty-one".