2154112210042 has 32 divisors (see below), whose sum is σ = 3519224755200. Its totient is φ = 982921070208.

The previous prime is 2154112210037. The next prime is 2154112210043. The reversal of 2154112210042 is 2400122114512.

It is a junction number, because it is equal to n+sod(n) for n = 2154112209989 and 2154112210016.

It is not an unprimeable number, because it can be changed into a prime (2154112210043) 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, 21885303 + ... + 21983509.

It is an arithmetic number, because the mean of its divisors is an integer number (109975773600).

Almost surely, 2^{2154112210042} is an apocalyptic number.

2154112210042 is a deficient number, since it is larger than the sum of its proper divisors (1365112545158).

2154112210042 is a wasteful number, since it uses less digits than its factorization.

2154112210042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107790.

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 2154112210042 its reverse (2400122114512), we get a palindrome (4554234324554).

The spelling of 2154112210042 in words is "two trillion, one hundred fifty-four billion, one hundred twelve million, two hundred ten thousand, forty-two".