180220121002 has 4 divisors (see below), whose sum is σ = 270330181506. Its totient is φ = 90110060500.

The previous prime is 180220120991. The next prime is 180220121117. The reversal of 180220121002 is 200121022081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 96230864521 + 83989256481 = 310211^2 + 289809^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45055030249 + ... + 45055030252.

Almost surely, 2^180220121002 is an apocalyptic number.

180220121002 is a deficient number, since it is larger than the sum of its proper divisors (90110060504).

180220121002 is an equidigital number, since it uses as much as digits as its factorization.

180220121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90110060503.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 180220121002 its reverse (200121022081), we get a palindrome (380341143083).

The spelling of 180220121002 in words is "one hundred eighty billion, two hundred twenty million, one hundred twenty-one thousand, two".