121210121211 has 8 divisors (see below), whose sum is σ = 161626707984. Its totient is φ = 80800140960.

The previous prime is 121210121189. The next prime is 121210121239. The reversal of 121210121211 is 112121012121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121210121211 - 2¹⁹ = 121209596923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121210121611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1608660 + ... + 1682321.

It is an arithmetic number, because the mean of its divisors is an integer number (20203338498).

Almost surely, 2^121210121211 is an apocalyptic number.

121210121211 is a deficient number, since it is larger than the sum of its proper divisors (40416586773).

121210121211 is a wasteful number, since it uses less digits than its factorization.

121210121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303261.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121210121211 its reverse (112121012121), we get a palindrome (233331133332).

The spelling of 121210121211 in words is "one hundred twenty-one billion, two hundred ten million, one hundred twenty-one thousand, two hundred eleven".