121102011 has 6 divisors (see below), whose sum is σ = 174925140. Its totient is φ = 80734668.

The previous prime is 121102001. The next prime is 121102013. The reversal of 121102011 is 110201121.

It is a happy number.

It is not a de Polignac number, because 121102011 - 2²¹ = 119004859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 13455779 = 121102011 / (1 + 2 + 1 + 1 + 0 + 2 + 0 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 121101984 and 121102002.

It is not an unprimeable number, because it can be changed into a prime (121102013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6727881 + ... + 6727898.

It is an arithmetic number, because the mean of its divisors is an integer number (29154190).

Almost surely, 2^121102011 is an apocalyptic number.

121102011 is a deficient number, since it is larger than the sum of its proper divisors (53823129).

121102011 is a wasteful number, since it uses less digits than its factorization.

121102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13455785 (or 13455782 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 121102011 is about 11004.6358867525. The cubic root of 121102011 is about 494.7477012399.

Adding to 121102011 its reverse (110201121), we get a palindrome (231303132).

The spelling of 121102011 in words is "one hundred twenty-one million, one hundred two thousand, eleven".