121201101 has 24 divisors (see below), whose sum is σ = 200403840. Its totient is φ = 69145056.

The previous prime is 121201051. The next prime is 121201117. The reversal of 121201101 is 101102121.

It is a happy number.

It is not a de Polignac number, because 121201101 - 2⁶ = 121201037 is a prime.

It is a super-2 number, since 2×121201101² = 29379413767224402, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51711 + ... + 54003.

It is an arithmetic number, because the mean of its divisors is an integer number (8350160).

Almost surely, 2^121201101 is an apocalyptic number.

It is an amenable number.

121201101 is a deficient number, since it is larger than the sum of its proper divisors (79202739).

121201101 is a wasteful number, since it uses less digits than its factorization.

121201101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145 (or 3142 counting only the distinct ones).

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

The square root of 121201101 is about 11009.1371596506. The cubic root of 121201101 is about 494.8826045448.

Adding to 121201101 its reverse (101102121), we get a palindrome (222303222).

The spelling of 121201101 in words is "one hundred twenty-one million, two hundred one thousand, one hundred one".