22151121144 has 16 divisors (see below), whose sum is σ = 55377802920. Its totient is φ = 7383707040.

The previous prime is 22151121143. The next prime is 22151121149. The reversal of 22151121144 is 44112115122.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 922963381 = 22151121144 / (2 + 2 + 1 + 5 + 1 + 1 + 2 + 1 + 1 + 4 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22151121143) 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, 461481667 + ... + 461481714.

Almost surely, 2^22151121144 is an apocalyptic number.

22151121144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22151121144 is an abundant number, since it is smaller than the sum of its proper divisors (33226681776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22151121144 is a wasteful number, since it uses less digits than its factorization.

22151121144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922963390 (or 922963386 counting only the distinct ones).

The product of its digits is 640, while the sum is 24.

Adding to 22151121144 its reverse (44112115122), we get a palindrome (66263236266).

The spelling of 22151121144 in words is "twenty-two billion, one hundred fifty-one million, one hundred twenty-one thousand, one hundred forty-four".