2131212121066 has 8 divisors (see below), whose sum is σ = 3653506493280. Its totient is φ = 913376623308.

The previous prime is 2131212121043. The next prime is 2131212121111. The reversal of 2131212121066 is 6601212121312.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76114718596 + ... + 76114718623.

It is an arithmetic number, because the mean of its divisors is an integer number (456688311660).

Almost surely, 2^{2131212121066} is an apocalyptic number.

2131212121066 is a deficient number, since it is larger than the sum of its proper divisors (1522294372214).

2131212121066 is a wasteful number, since it uses less digits than its factorization.

2131212121066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152229437228.

The product of its (nonzero) digits is 1728, while the sum is 28.

Adding to 2131212121066 its reverse (6601212121312), we get a palindrome (8732424242378).

The spelling of 2131212121066 in words is "two trillion, one hundred thirty-one billion, two hundred twelve million, one hundred twenty-one thousand, sixty-six".