121201311 has 16 divisors (see below), whose sum is σ = 201477888. Its totient is φ = 62961600.

The previous prime is 121201273. The next prime is 121201319. The reversal of 121201311 is 113102121.

It is not a de Polignac number, because 121201311 - 2¹⁴ = 121184927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201319) 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, 262110 + ... + 262571.

It is an arithmetic number, because the mean of its divisors is an integer number (12592368).

Almost surely, 2^121201311 is an apocalyptic number.

121201311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121201311 is a deficient number, since it is larger than the sum of its proper divisors (80276577).

121201311 is a wasteful number, since it uses less digits than its factorization.

121201311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524702.

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

The square root of 121201311 is about 11009.1466971787. The cubic root of 121201311 is about 494.8828903654.

Adding to 121201311 its reverse (113102121), we get a palindrome (234303432).

It can be divided in two parts, 12120 and 1311, that added together give a palindrome (13431).

The spelling of 121201311 in words is "one hundred twenty-one million, two hundred one thousand, three hundred eleven".