121131231011012 has 24 divisors (see below), whose sum is σ = 223768592896800. Its totient is φ = 57215407746816.

The previous prime is 121131231010973. The next prime is 121131231011023. The reversal of 121131231011012 is 210110132131121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2257525562 + ... + 2257579217.

It is an arithmetic number, because the mean of its divisors is an integer number (9323691370700).

Almost surely, 2^{121131231011012} is an apocalyptic number.

It is an amenable number.

121131231011012 is a deficient number, since it is larger than the sum of its proper divisors (102637361885788).

121131231011012 is a wasteful number, since it uses less digits than its factorization.

121131231011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4515105155 (or 4515105153 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 121131231011012 its reverse (210110132131121), we get a palindrome (331241363142133).

The spelling of 121131231011012 in words is "one hundred twenty-one trillion, one hundred thirty-one billion, two hundred thirty-one million, eleven thousand, twelve".