22120221121002 has 80 divisors (see below), whose sum is σ = 52482558594312. Its totient is φ = 6939511971840.

The previous prime is 22120221121001. The next prime is 22120221121003. The reversal of 22120221121002 is 20012112202122.

It is a happy number.

22120221121002 is a `hidden beast` number, since 221 + 20 + 2 + 211 + 210 + 0 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (22120221121001) and next prime (22120221121003).

It can be written as a sum of positive squares in 4 ways, for example, as 22071119436081 + 49101684921 = 4697991^2 + 221589^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22120221121001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 171435352 + ... + 171564332.

Almost surely, 2^{22120221121002} is an apocalyptic number.

22120221121002 is an abundant number, since it is smaller than the sum of its proper divisors (30362337473310).

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

22120221121002 is a wasteful number, since it uses less digits than its factorization.

22120221121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191285 (or 191276 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22120221121002 its reverse (20012112202122), we get a palindrome (42132333323124).

The spelling of 22120221121002 in words is "twenty-two trillion, one hundred twenty billion, two hundred twenty-one million, one hundred twenty-one thousand, two".