22012121101 has 12 divisors (see below), whose sum is σ = 23532103828. Its totient is φ = 20585290752.

The previous prime is 22012121081. The next prime is 22012121147. The reversal of 22012121101 is 10112121022.

It can be written as a sum of positive squares in 6 ways, for example, as 841580100 + 21170541001 = 29010^2 + 145501^2 .

It is not a de Polignac number, because 22012121101 - 2¹⁹ = 22011596813 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 (22012121171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197196 + ... + 287941.

Almost surely, 2^22012121101 is an apocalyptic number.

It is an amenable number.

22012121101 is a deficient number, since it is larger than the sum of its proper divisors (1519982727).

22012121101 is a wasteful number, since it uses less digits than its factorization.

22012121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485328 (or 485311 counting only the distinct ones).

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

Adding to 22012121101 its reverse (10112121022), we get a palindrome (32124242123).

The spelling of 22012121101 in words is "twenty-two billion, twelve million, one hundred twenty-one thousand, one hundred one".