121121011 has 16 divisors (see below), whose sum is σ = 135991296. Its totient is φ = 106920000.

The previous prime is 121121003. The next prime is 121121083. The reversal of 121121011 is 110121121.

It is not a de Polignac number, because 121121011 - 2³ = 121121003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121911) 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, 121726 + ... + 122716.

It is an arithmetic number, because the mean of its divisors is an integer number (8499456).

Almost surely, 2^121121011 is an apocalyptic number.

121121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121121011 is a deficient number, since it is larger than the sum of its proper divisors (14870285).

121121011 is a wasteful number, since it uses less digits than its factorization.

121121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 121121011 is about 11005.4991254372. The cubic root of 121121011 is about 494.7735739585.

Adding to 121121011 its reverse (110121121), we get a palindrome (231242132).

It can be divided in two parts, 1211 and 21011, that added together give a palindrome (22222).

The spelling of 121121011 in words is "one hundred twenty-one million, one hundred twenty-one thousand, eleven".