122021212021111 has 16 divisors (see below), whose sum is σ = 141418249152768. Its totient is φ = 104271520089600.

The previous prime is 122021212021099. The next prime is 122021212021201. The reversal of 122021212021111 is 111120212120221.

It is a happy number.

It is not a de Polignac number, because 122021212021111 - 2⁴⁵ = 86836839932279 is a prime.

It is a super-2 number, since 2×122021212021111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122021212021411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4525660135 + ... + 4525687096.

It is an arithmetic number, because the mean of its divisors is an integer number (8838640572048).

Almost surely, 2^{122021212021111} is an apocalyptic number.

122021212021111 is a deficient number, since it is larger than the sum of its proper divisors (19397037131657).

122021212021111 is a wasteful number, since it uses less digits than its factorization.

122021212021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9051347322.

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

Adding to 122021212021111 its reverse (111120212120221), we get a palindrome (233141424141332).

The spelling of 122021212021111 in words is "one hundred twenty-two trillion, twenty-one billion, two hundred twelve million, twenty-one thousand, one hundred eleven".