20010021212122 has 8 divisors (see below), whose sum is σ = 30290399082900. Its totient is φ = 9913221517824.

The previous prime is 20010021212057. The next prime is 20010021212123. The reversal of 20010021212122 is 22121212001002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19160746535401 + 849274676721 = 4377299^2 + 921561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20010021212096 and 20010021212105.

It is not an unprimeable number, because it can be changed into a prime (20010021212123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45894543847 + ... + 45894544282.

Almost surely, 2^{20010021212122} is an apocalyptic number.

20010021212122 is a deficient number, since it is larger than the sum of its proper divisors (10280377870778).

20010021212122 is a wasteful number, since it uses less digits than its factorization.

20010021212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91789088240.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20010021212122 its reverse (22121212001002), we get a palindrome (42131233213124).

The spelling of 20010021212122 in words is "twenty trillion, ten billion, twenty-one million, two hundred twelve thousand, one hundred twenty-two".