121011231 has 16 divisors (see below), whose sum is σ = 177763968. Its totient is φ = 72612000.

The previous prime is 121011223. The next prime is 121011299. The reversal of 121011231 is 132110121.

It is not a de Polignac number, because 121011231 - 2³ = 121011223 is a prime.

It is a super-2 number, since 2×121011231² = 29287436056270722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121013231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14821 + ... + 21486.

It is an arithmetic number, because the mean of its divisors is an integer number (11110248).

Almost surely, 2^121011231 is an apocalyptic number.

121011231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121011231 is a deficient number, since it is larger than the sum of its proper divisors (56752737).

121011231 is a wasteful number, since it uses less digits than its factorization.

121011231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36422.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 121011231 is about 11000.5104881546. The cubic root of 121011231 is about 494.6240467462.

Adding to 121011231 its reverse (132110121), we get a palindrome (253121352).

The spelling of 121011231 in words is "one hundred twenty-one million, eleven thousand, two hundred thirty-one".