122021021212111 has 4 divisors (see below), whose sum is σ = 139452595670992. Its totient is φ = 104589446753232.

The previous prime is 122021021212087. The next prime is 122021021212121. The reversal of 122021021212111 is 111212120120221.

It is a happy number.

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

It is not a de Polignac number, because 122021021212111 - 2⁹ = 122021021211599 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 (122021021212121) 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, 8715787229430 + ... + 8715787229443.

It is an arithmetic number, because the mean of its divisors is an integer number (34863148917748).

Almost surely, 2^{122021021212111} is an apocalyptic number.

122021021212111 is a deficient number, since it is larger than the sum of its proper divisors (17431574458881).

122021021212111 is an equidigital number, since it uses as much as digits as its factorization.

122021021212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17431574458880.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 122021021212111 its reverse (111212120120221), we get a palindrome (233233141332332).

The spelling of 122021021212111 in words is "one hundred twenty-two trillion, twenty-one billion, twenty-one million, two hundred twelve thousand, one hundred eleven".