121000001211 has 24 divisors (see below), whose sum is σ = 179558890784. Its totient is φ = 78461395200.

The previous prime is 121000001201. The next prime is 121000001267. The reversal of 121000001211 is 112100000121.

It is a happy number.

It is not a de Polignac number, because 121000001211 - 2¹¹ = 120999999163 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 = 121000001193 and 121000001202.

It is not an unprimeable number, because it can be changed into a prime (121000001201) 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, 1014786 + ... + 1127736.

Almost surely, 2^121000001211 is an apocalyptic number.

121000001211 is a deficient number, since it is larger than the sum of its proper divisors (58558889573).

121000001211 is a wasteful number, since it uses less digits than its factorization.

121000001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116211 (or 116208 counting only the distinct ones).

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

Adding to 121000001211 its reverse (112100000121), we get a palindrome (233100001332).

The spelling of 121000001211 in words is "one hundred twenty-one billion, one thousand, two hundred eleven".