121231122101 has 2 divisors, whose sum is σ = 121231122102. Its totient is φ = 121231122100.

The previous prime is 121231122059. The next prime is 121231122203. The reversal of 121231122101 is 101221132121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62563015876 + 58668106225 = 250126^2 + 242215^2 .

It is a cyclic number.

It is not a de Polignac number, because 121231122101 - 2¹⁸ = 121230859957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121231122101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121231128101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60615561050 + 60615561051.

It is an arithmetic number, because the mean of its divisors is an integer number (60615561051).

Almost surely, 2^121231122101 is an apocalyptic number.

It is an amenable number.

121231122101 is a deficient number, since it is larger than the sum of its proper divisors (1).

121231122101 is an equidigital number, since it uses as much as digits as its factorization.

121231122101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121231122101 its reverse (101221132121), we get a palindrome (222452254222).

The spelling of 121231122101 in words is "one hundred twenty-one billion, two hundred thirty-one million, one hundred twenty-two thousand, one hundred one".