20101228174121 has 16 divisors (see below), whose sum is σ = 21318147259200. Its totient is φ = 18888147683328.

The previous prime is 20101228174117. The next prime is 20101228174123. The reversal of 20101228174121 is 12147182210102.

It is not a de Polignac number, because 20101228174121 - 2² = 20101228174117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101228174123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115001090 + ... + 115175748.

It is an arithmetic number, because the mean of its divisors is an integer number (1332384203700).

Almost surely, 2^{20101228174121} is an apocalyptic number.

It is an amenable number.

20101228174121 is a deficient number, since it is larger than the sum of its proper divisors (1216919085079).

20101228174121 is a wasteful number, since it uses less digits than its factorization.

20101228174121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185608.

The product of its (nonzero) digits is 3584, while the sum is 32.

The spelling of 20101228174121 in words is "twenty trillion, one hundred one billion, two hundred twenty-eight million, one hundred seventy-four thousand, one hundred twenty-one".