20010101211121 has 8 divisors (see below), whose sum is σ = 22868977064960. Its totient is φ = 17151297848928.

The previous prime is 20010101211119. The next prime is 20010101211157. The reversal of 20010101211121 is 12111210101002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20010101211121 - 2¹ = 20010101211119 is a prime.

It is a super-2 number, since 2×20010101211121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20010101211161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17530116 + ... + 18636661.

It is an arithmetic number, because the mean of its divisors is an integer number (2858622133120).

Almost surely, 2^{20010101211121} is an apocalyptic number.

It is an amenable number.

20010101211121 is a deficient number, since it is larger than the sum of its proper divisors (2858875853839).

20010101211121 is an equidigital number, since it uses as much as digits as its factorization.

20010101211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36245823.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20010101211121 its reverse (12111210101002), we get a palindrome (32121311312123).

The spelling of 20010101211121 in words is "twenty trillion, ten billion, one hundred one million, two hundred eleven thousand, one hundred twenty-one".