220121111011001 has 16 divisors (see below), whose sum is σ = 225500551495296. Its totient is φ = 214753645927296.

The previous prime is 220121111010971. The next prime is 220121111011007. The reversal of 220121111011001 is 100110111121022.

It is a cyclic number.

It is not a de Polignac number, because 220121111011001 - 2³⁰ = 220120037269177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220121111011007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130065821 + ... + 131747333.

It is an arithmetic number, because the mean of its divisors is an integer number (14093784468456).

Almost surely, 2^{220121111011001} is an apocalyptic number.

It is an amenable number.

220121111011001 is a deficient number, since it is larger than the sum of its proper divisors (5379440484295).

220121111011001 is a wasteful number, since it uses less digits than its factorization.

220121111011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685072.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 220121111011001 its reverse (100110111121022), we get a palindrome (320231222132023).

The spelling of 220121111011001 in words is "two hundred twenty trillion, one hundred twenty-one billion, one hundred eleven million, eleven thousand, one".