20021200010122 has 4 divisors (see below), whose sum is σ = 30031800015186. Its totient is φ = 10010600005060.

The previous prime is 20021200010093. The next prime is 20021200010137. The reversal of 20021200010122 is 22101000212002.

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., 19993587873561 + 27612136561 = 4471419^2 + 166169^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005300002529 + ... + 5005300002532.

Almost surely, 2^{20021200010122} is an apocalyptic number.

20021200010122 is a deficient number, since it is larger than the sum of its proper divisors (10010600005064).

20021200010122 is a wasteful number, since it uses less digits than its factorization.

20021200010122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010600005063.

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

Adding to 20021200010122 its reverse (22101000212002), we get a palindrome (42122200222124).

The spelling of 20021200010122 in words is "twenty trillion, twenty-one billion, two hundred million, ten thousand, one hundred twenty-two".