12121011801670 has 32 divisors (see below), whose sum is σ = 21941194140000. Its totient is φ = 4820992190976.

The previous prime is 12121011801653. The next prime is 12121011801707. The reversal of 12121011801670 is 7610811012121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27124206 + ... + 27567454.

It is an arithmetic number, because the mean of its divisors is an integer number (685662316875).

Almost surely, 2^{12121011801670} is an apocalyptic number.

12121011801670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121011801670 is a deficient number, since it is larger than the sum of its proper divisors (9820182338330).

12121011801670 is a wasteful number, since it uses less digits than its factorization.

12121011801670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458712.

The product of its (nonzero) digits is 1344, while the sum is 31.

Adding to 12121011801670 its reverse (7610811012121), we get a palindrome (19731822813791).

The spelling of 12121011801670 in words is "twelve trillion, one hundred twenty-one billion, eleven million, eight hundred one thousand, six hundred seventy".