121211010111 has 8 divisors (see below), whose sum is σ = 163214825904. Its totient is φ = 80007267200.

The previous prime is 121211010083. The next prime is 121211010113. The reversal of 121211010111 is 111010112121.

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

It is a cyclic number.

It is not a de Polignac number, because 121211010111 - 2¹⁴ = 121210993727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211010113) 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, 200017866 + ... + 200018471.

It is an arithmetic number, because the mean of its divisors is an integer number (20401853238).

Almost surely, 2^121211010111 is an apocalyptic number.

121211010111 is a deficient number, since it is larger than the sum of its proper divisors (42003815793).

121211010111 is a wasteful number, since it uses less digits than its factorization.

121211010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400036441.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121211010111 its reverse (111010112121), we get a palindrome (232221122232).

It can be divided in two parts, 1212110 and 10111, that added together give a palindrome (1222221).

The spelling of 121211010111 in words is "one hundred twenty-one billion, two hundred eleven million, ten thousand, one hundred eleven".