121201011 has 12 divisors (see below), whose sum is σ = 179800192. Its totient is φ = 78616656.

The previous prime is 121200997. The next prime is 121201037. The reversal of 121201011 is 110102121.

It is a happy number.

It is not a de Polignac number, because 121201011 - 2¹⁴ = 121184627 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121200984 and 121201002.

It is not an unprimeable number, because it can be changed into a prime (121201051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181651 + ... + 182316.

Almost surely, 2^121201011 is an apocalyptic number.

121201011 is a deficient number, since it is larger than the sum of its proper divisors (58599181).

121201011 is a wasteful number, since it uses less digits than its factorization.

121201011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364010 (or 364007 counting only the distinct ones).

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

The square root of 121201011 is about 11009.1330721361. The cubic root of 121201011 is about 494.8824820502.

Adding to 121201011 its reverse (110102121), we get a palindrome (231303132).

It can be divided in two parts, 12120 and 1011, that added together give a palindrome (13131).

The spelling of 121201011 in words is "one hundred twenty-one million, two hundred one thousand, eleven".