121213433121 has 32 divisors (see below), whose sum is σ = 184044160896. Its totient is φ = 70305408000.

The previous prime is 121213433119. The next prime is 121213433123. The reversal of 121213433121 is 121334312121.

It is an interprime number because it is at equal distance from previous prime (121213433119) and next prime (121213433123).

It is not a de Polignac number, because 121213433121 - 2¹ = 121213433119 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121213433091 and 121213433100.

It is not an unprimeable number, because it can be changed into a prime (121213433123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 739240 + ... + 888201.

It is an arithmetic number, because the mean of its divisors is an integer number (5751380028).

Almost surely, 2^121213433121 is an apocalyptic number.

121213433121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121213433121 is a deficient number, since it is larger than the sum of its proper divisors (62830727775).

121213433121 is a wasteful number, since it uses less digits than its factorization.

121213433121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627553.

The product of its digits is 864, while the sum is 24.

Adding to 121213433121 its reverse (121334312121), we get a palindrome (242547745242).

The spelling of 121213433121 in words is "one hundred twenty-one billion, two hundred thirteen million, four hundred thirty-three thousand, one hundred twenty-one".