22012112121 has 8 divisors (see below), whose sum is σ = 30361534080. Its totient is φ = 14168715792.

The previous prime is 22012112107. The next prime is 22012112131. The reversal of 22012112121 is 12121121022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22012112121 - 2⁹ = 22012111609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22012112121.

It is not an unprimeable number, because it can be changed into a prime (22012112131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126506305 + ... + 126506478.

It is an arithmetic number, because the mean of its divisors is an integer number (3795191760).

Almost surely, 2^22012112121 is an apocalyptic number.

It is an amenable number.

22012112121 is a deficient number, since it is larger than the sum of its proper divisors (8349421959).

22012112121 is a wasteful number, since it uses less digits than its factorization.

22012112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253012815.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22012112121 its reverse (12121121022), we get a palindrome (34133233143).

The spelling of 22012112121 in words is "twenty-two billion, twelve million, one hundred twelve thousand, one hundred twenty-one".