1231210122121 has 8 divisors (see below), whose sum is σ = 1407665367360. Its totient is φ = 1054896898128.

The previous prime is 1231210122101. The next prime is 1231210122167. The reversal of 1231210122121 is 1212210121321.

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

It is a cyclic number.

It is not a de Polignac number, because 1231210122121 - 2⁷ = 1231210121993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231210122101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35486731 + ... + 35521408.

It is an arithmetic number, because the mean of its divisors is an integer number (175958170920).

Almost surely, 2^{1231210122121} is an apocalyptic number.

It is an amenable number.

1231210122121 is a deficient number, since it is larger than the sum of its proper divisors (176455245239).

1231210122121 is an equidigital number, since it uses as much as digits as its factorization.

1231210122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71010623.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1231210122121 its reverse (1212210121321), we get a palindrome (2443420243442).

The spelling of 1231210122121 in words is "one trillion, two hundred thirty-one billion, two hundred ten million, one hundred twenty-two thousand, one hundred twenty-one".