22012121019 has 16 divisors (see below), whose sum is σ = 33552546560. Its totient is φ = 12574504800.

The previous prime is 22012121017. The next prime is 22012121029. The reversal of 22012121019 is 91012121022.

It is not a de Polignac number, because 22012121019 - 2¹ = 22012121017 is a prime.

It is a super-2 number, since 2×22012121019² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22012120986 and 22012121004.

It is not an unprimeable number, because it can be changed into a prime (22012121017) 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, 89449 + ... + 228090.

It is an arithmetic number, because the mean of its divisors is an integer number (2097034160).

Almost surely, 2^22012121019 is an apocalyptic number.

22012121019 is a deficient number, since it is larger than the sum of its proper divisors (11540425541).

22012121019 is a wasteful number, since it uses less digits than its factorization.

22012121019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320850.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 22012121019 in words is "twenty-two billion, twelve million, one hundred twenty-one thousand, nineteen".