2152781994111 has 16 divisors (see below), whose sum is σ = 3280518316800. Its totient is φ = 1230127910208.

The previous prime is 2152781994061. The next prime is 2152781994149. The reversal of 2152781994111 is 1114991872512.

It is a happy number.

It is not a de Polignac number, because 2152781994111 - 2⁶ = 2152781994047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152781994191) 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, 577681 + ... + 2153898.

It is an arithmetic number, because the mean of its divisors is an integer number (205032394800).

Almost surely, 2^{2152781994111} is an apocalyptic number.

2152781994111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2152781994111 is a deficient number, since it is larger than the sum of its proper divisors (1127736322689).

2152781994111 is a wasteful number, since it uses less digits than its factorization.

2152781994111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769118.

The product of its digits is 362880, while the sum is 51.

The spelling of 2152781994111 in words is "two trillion, one hundred fifty-two billion, seven hundred eighty-one million, nine hundred ninety-four thousand, one hundred eleven".