122021020111 has 4 divisors (see below), whose sum is σ = 122022468424. Its totient is φ = 122019571800.

The previous prime is 122021020103. The next prime is 122021020123. The reversal of 122021020111 is 111020120221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111020120221 = 2267 ⋅48972263.

It is a cyclic number.

It is not a de Polignac number, because 122021020111 - 2³ = 122021020103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122021020091 and 122021020100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122021020711) 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, 589425 + ... + 769066.

It is an arithmetic number, because the mean of its divisors is an integer number (30505617106).

Almost surely, 2^122021020111 is an apocalyptic number.

122021020111 is a deficient number, since it is larger than the sum of its proper divisors (1448313).

122021020111 is an equidigital number, since it uses as much as digits as its factorization.

122021020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448312.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 122021020111 its reverse (111020120221), we get a palindrome (233041140332).

The spelling of 122021020111 in words is "one hundred twenty-two billion, twenty-one million, twenty thousand, one hundred eleven".