2154402001123 has 4 divisors (see below), whose sum is σ = 2155740972280. Its totient is φ = 2153063029968.

The previous prime is 2154402001079. The next prime is 2154402001159. The reversal of 2154402001123 is 3211002044512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2154402001123 - 2²⁵ = 2154368446691 is a prime.

It is a super-2 number, since 2×2154402001123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154402001223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669483165 + ... + 669486382.

It is an arithmetic number, because the mean of its divisors is an integer number (538935243070).

Almost surely, 2^{2154402001123} is an apocalyptic number.

2154402001123 is a deficient number, since it is larger than the sum of its proper divisors (1338971157).

2154402001123 is a wasteful number, since it uses less digits than its factorization.

2154402001123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338971156.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 2154402001123 its reverse (3211002044512), we get a palindrome (5365404045635).

The spelling of 2154402001123 in words is "two trillion, one hundred fifty-four billion, four hundred two million, one thousand, one hundred twenty-three".