220121202221101 has 4 divisors (see below), whose sum is σ = 220334704843104. Its totient is φ = 219907699599100.

The previous prime is 220121202221027. The next prime is 220121202221159. The reversal of 220121202221101 is 101122202121022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220121202221101 - 2⁹ = 220121202220589 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 (220121202221801) 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, 106751309455 + ... + 106751311516.

It is an arithmetic number, because the mean of its divisors is an integer number (55083676210776).

Almost surely, 2^{220121202221101} is an apocalyptic number.

It is an amenable number.

220121202221101 is a deficient number, since it is larger than the sum of its proper divisors (213502622003).

220121202221101 is a wasteful number, since it uses less digits than its factorization.

220121202221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213502622002.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 220121202221101 its reverse (101122202121022), we get a palindrome (321243404342123).

The spelling of 220121202221101 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred two million, two hundred twenty-one thousand, one hundred one".