121231011 has 16 divisors (see below), whose sum is σ = 176659200. Its totient is φ = 73338720.

The previous prime is 121231003. The next prime is 121231013. The reversal of 121231011 is 110132121.

It is not a de Polignac number, because 121231011 - 2³ = 121231003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121231013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16701 + ... + 22833.

It is an arithmetic number, because the mean of its divisors is an integer number (11041200).

Almost surely, 2^121231011 is an apocalyptic number.

121231011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121231011 is a deficient number, since it is larger than the sum of its proper divisors (55428189).

121231011 is a wasteful number, since it uses less digits than its factorization.

121231011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6746.

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

The square root of 121231011 is about 11010.4954929376. The cubic root of 121231011 is about 494.9233102291.

Adding to 121231011 its reverse (110132121), we get a palindrome (231363132).

It can be divided in two parts, 1212 and 31011, that added together give a palindrome (32223).

The spelling of 121231011 in words is "one hundred twenty-one million, two hundred thirty-one thousand, eleven".