21020220110002 has 4 divisors (see below), whose sum is σ = 31530330165006. Its totient is φ = 10510110055000.

The previous prime is 21020220109997. The next prime is 21020220110039. The reversal of 21020220110002 is 20001102202012.

It is a happy number.

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., 11271456575401 + 9748763534601 = 3357299^2 + 3122301^2 .

It is a super-3 number, since 3×21020220110002³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5255055027499 + ... + 5255055027502.

Almost surely, 2^{21020220110002} is an apocalyptic number.

21020220110002 is a deficient number, since it is larger than the sum of its proper divisors (10510110055004).

21020220110002 is a wasteful number, since it uses less digits than its factorization.

21020220110002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10510110055003.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21020220110002 its reverse (20001102202012), we get a palindrome (41021322312014).

It can be divided in two parts, 21020 and 220110002, that added together give a palindrome (220131022).

The spelling of 21020220110002 in words is "twenty-one trillion, twenty billion, two hundred twenty million, one hundred ten thousand, two".