121011221211 has 32 divisors (see below), whose sum is σ = 169118208000. Its totient is φ = 76877475840.

The previous prime is 121011221183. The next prime is 121011221237. The reversal of 121011221211 is 112122110121.

It is a happy number.

It is not a de Polignac number, because 121011221211 - 2¹⁴ = 121011204827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121011221911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1761475 + ... + 1828883.

It is an arithmetic number, because the mean of its divisors is an integer number (5284944000).

Almost surely, 2^121011221211 is an apocalyptic number.

121011221211 is a deficient number, since it is larger than the sum of its proper divisors (48106986789).

121011221211 is a wasteful number, since it uses less digits than its factorization.

121011221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67739.

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

Adding to 121011221211 its reverse (112122110121), we get a palindrome (233133331332).

The spelling of 121011221211 in words is "one hundred twenty-one billion, eleven million, two hundred twenty-one thousand, two hundred eleven".