121311222141 has 4 divisors (see below), whose sum is σ = 161748296192. Its totient is φ = 80874148092.

The previous prime is 121311222121. The next prime is 121311222143. The reversal of 121311222141 is 141222113121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 141222113121 = 3 ⋅47074037707.

It is not a de Polignac number, because 121311222141 - 2¹⁸ = 121310959997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121311222143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20218537021 + ... + 20218537026.

It is an arithmetic number, because the mean of its divisors is an integer number (40437074048).

Almost surely, 2^121311222141 is an apocalyptic number.

It is an amenable number.

121311222141 is a deficient number, since it is larger than the sum of its proper divisors (40437074051).

121311222141 is an equidigital number, since it uses as much as digits as its factorization.

121311222141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40437074050.

The product of its digits is 192, while the sum is 21.

Adding to 121311222141 its reverse (141222113121), we get a palindrome (262533335262).

The spelling of 121311222141 in words is "one hundred twenty-one billion, three hundred eleven million, two hundred twenty-two thousand, one hundred forty-one".