22121213101 has 4 divisors (see below), whose sum is σ = 23822844892. Its totient is φ = 20419581312.

The previous prime is 22121213041. The next prime is 22121213119. The reversal of 22121213101 is 10131212122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7292306025 + 14828907076 = 85395^2 + 121774^2 .

It is not a de Polignac number, because 22121213101 - 2¹³ = 22121204909 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 (22121223101) 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, 850815876 + ... + 850815901.

It is an arithmetic number, because the mean of its divisors is an integer number (5955711223).

Almost surely, 2^22121213101 is an apocalyptic number.

It is an amenable number.

22121213101 is a deficient number, since it is larger than the sum of its proper divisors (1701631791).

22121213101 is a wasteful number, since it uses less digits than its factorization.

22121213101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701631790.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 22121213101 its reverse (10131212122), we get a palindrome (32252425223).

The spelling of 22121213101 in words is "twenty-two billion, one hundred twenty-one million, two hundred thirteen thousand, one hundred one".