122021020021111 has 4 divisors (see below), whose sum is σ = 123692540843392. Its totient is φ = 120349499198832.

The previous prime is 122021020021097. The next prime is 122021020021129. The reversal of 122021020021111 is 111120020120221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122021020021111 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 (122021020025111) 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, 835760411031 + ... + 835760411176.

It is an arithmetic number, because the mean of its divisors is an integer number (30923135210848).

Almost surely, 2^{122021020021111} is an apocalyptic number.

122021020021111 is a deficient number, since it is larger than the sum of its proper divisors (1671520822281).

122021020021111 is an equidigital number, since it uses as much as digits as its factorization.

122021020021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671520822280.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 122021020021111 its reverse (111120020120221), we get a palindrome (233141040141332).

The spelling of 122021020021111 in words is "one hundred twenty-two trillion, twenty-one billion, twenty million, twenty-one thousand, one hundred eleven".