120221211212111 has 4 divisors (see below), whose sum is σ = 120221428680912. Its totient is φ = 120220993743312.

The previous prime is 120221211212017. The next prime is 120221211212119. The reversal of 120221211212111 is 111212112122021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120221211212111 - 2¹⁴ = 120221211195727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120221211212119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107903051 + ... + 109011516.

It is an arithmetic number, because the mean of its divisors is an integer number (30055357170228).

Almost surely, 2^{120221211212111} is an apocalyptic number.

120221211212111 is a deficient number, since it is larger than the sum of its proper divisors (217468801).

120221211212111 is an equidigital number, since it uses as much as digits as its factorization.

120221211212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217468800.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 120221211212111 its reverse (111212112122021), we get a palindrome (231433323334132).

The spelling of 120221211212111 in words is "one hundred twenty trillion, two hundred twenty-one billion, two hundred eleven million, two hundred twelve thousand, one hundred eleven".