122221001011 has 4 divisors (see below), whose sum is σ = 122368790232. Its totient is φ = 122073211792.

The previous prime is 122221000973. The next prime is 122221001093. The reversal of 122221001011 is 110100122221.

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-122221001011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122221000982 and 122221001000.

It is not an unprimeable number, because it can be changed into a prime (122221001411) 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, 73893370 + ... + 73895023.

It is an arithmetic number, because the mean of its divisors is an integer number (30592197558).

Almost surely, 2^122221001011 is an apocalyptic number.

122221001011 is a deficient number, since it is larger than the sum of its proper divisors (147789221).

122221001011 is an equidigital number, since it uses as much as digits as its factorization.

122221001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147789220.

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

Adding to 122221001011 its reverse (110100122221), we get a palindrome (232321123232).

The spelling of 122221001011 in words is "one hundred twenty-two billion, two hundred twenty-one million, one thousand, eleven".