20010122001211 has 4 divisors (see below), whose sum is σ = 20011128111000. Its totient is φ = 20009115891424.

The previous prime is 20010122001197. The next prime is 20010122001229. The reversal of 20010122001211 is 11210022101002.

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

It is a cyclic number.

It is not a de Polignac number, because 20010122001211 - 2³⁵ = 19975762262843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010122001191 and 20010122001200.

It is not an unprimeable number, because it can be changed into a prime (20010122001271) 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, 503025061 + ... + 503064838.

It is an arithmetic number, because the mean of its divisors is an integer number (5002782027750).

Almost surely, 2^{20010122001211} is an apocalyptic number.

20010122001211 is a deficient number, since it is larger than the sum of its proper divisors (1006109789).

20010122001211 is a wasteful number, since it uses less digits than its factorization.

20010122001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006109788.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20010122001211 its reverse (11210022101002), we get a palindrome (31220144102213).

The spelling of 20010122001211 in words is "twenty trillion, ten billion, one hundred twenty-two million, one thousand, two hundred eleven".