22011001002 has 48 divisors (see below), whose sum is σ = 49017164040. Its totient is φ = 7135603200.

The previous prime is 22011000901. The next prime is 22011001007. The reversal of 22011001002 is 20010011022.

It can be written as a sum of positive squares in 4 ways, for example, as 7399268361 + 14611732641 = 86019^2 + 120879^2 .

It is a super-2 number, since 2×22011001002² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (22011001007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14899 + ... + 210342.

Almost surely, 2^22011001002 is an apocalyptic number.

22011001002 is an abundant number, since it is smaller than the sum of its proper divisors (27006163038).

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

22011001002 is a wasteful number, since it uses less digits than its factorization.

22011001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225399 (or 225396 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 22011001002 its reverse (20010011022), we get a palindrome (42021012024).

The spelling of 22011001002 in words is "twenty-two billion, eleven million, one thousand, two".