20110220100121 has 8 divisors (see below), whose sum is σ = 20193805606304. Its totient is φ = 20026635756480.

The previous prime is 20110220100067. The next prime is 20110220100127. The reversal of 20110220100121 is 12100102201102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20110220100121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20110220100127) 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, 62409406 + ... + 62730808.

It is an arithmetic number, because the mean of its divisors is an integer number (2524225700788).

Almost surely, 2^{20110220100121} is an apocalyptic number.

It is an amenable number.

20110220100121 is a deficient number, since it is larger than the sum of its proper divisors (83585506183).

20110220100121 is a wasteful number, since it uses less digits than its factorization.

20110220100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581271.

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

Adding to 20110220100121 its reverse (12100102201102), we get a palindrome (32210322301223).

The spelling of 20110220100121 in words is "twenty trillion, one hundred ten billion, two hundred twenty million, one hundred thousand, one hundred twenty-one".