2154121120101 has 8 divisors (see below), whose sum is σ = 2876048047840. Its totient is φ = 1434137469552.

The previous prime is 2154121120097. The next prime is 2154121120117. The reversal of 2154121120101 is 1010211214512.

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

It is not a de Polignac number, because 2154121120101 - 2² = 2154121120097 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 (2154121124101) 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, 485816710 + ... + 485821143.

It is an arithmetic number, because the mean of its divisors is an integer number (359506005980).

Almost surely, 2^{2154121120101} is an apocalyptic number.

It is an amenable number.

2154121120101 is a deficient number, since it is larger than the sum of its proper divisors (721926927739).

2154121120101 is an equidigital number, since it uses as much as digits as its factorization.

2154121120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971638595.

The product of its (nonzero) digits is 160, while the sum is 21.

Adding to 2154121120101 its reverse (1010211214512), we get a palindrome (3164332334613).

The spelling of 2154121120101 in words is "two trillion, one hundred fifty-four billion, one hundred twenty-one million, one hundred twenty thousand, one hundred one".