20010121002111 has 8 divisors (see below), whose sum is σ = 28084380353920. Its totient is φ = 12637971159192.

The previous prime is 20010121002107. The next prime is 20010121002121. The reversal of 20010121002111 is 11120012101002.

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

It is not a de Polignac number, because 20010121002111 - 2² = 20010121002107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010121002121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175527377155 + ... + 175527377268.

It is an arithmetic number, because the mean of its divisors is an integer number (3510547544240).

Almost surely, 2^{20010121002111} is an apocalyptic number.

20010121002111 is a deficient number, since it is larger than the sum of its proper divisors (8074259351809).

20010121002111 is a wasteful number, since it uses less digits than its factorization.

20010121002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351054754445.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20010121002111 its reverse (11120012101002), we get a palindrome (31130133103113).

The spelling of 20010121002111 in words is "twenty trillion, ten billion, one hundred twenty-one million, two thousand, one hundred eleven".