121221101103131 has 4 divisors (see below), whose sum is σ = 125131459203264. Its totient is φ = 117310743003000.

The previous prime is 121221101103043. The next prime is 121221101103197. The reversal of 121221101103131 is 131301101122121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121221101103131 - 2¹⁴ = 121221101086747 is a prime.

It is a super-2 number, since 2×121221101103131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221101003131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1955179050020 + ... + 1955179050081.

It is an arithmetic number, because the mean of its divisors is an integer number (31282864800816).

Almost surely, 2^{121221101103131} is an apocalyptic number.

121221101103131 is a deficient number, since it is larger than the sum of its proper divisors (3910358100133).

121221101103131 is an equidigital number, since it uses as much as digits as its factorization.

121221101103131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910358100132.

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

Adding to 121221101103131 its reverse (131301101122121), we get a palindrome (252522202225252).

The spelling of 121221101103131 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred one million, one hundred three thousand, one hundred thirty-one".