121211012201 has 2 divisors, whose sum is σ = 121211012202. Its totient is φ = 121211012200.

The previous prime is 121211012179. The next prime is 121211012249. The reversal of 121211012201 is 102210112121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114734625625 + 6476386576 = 338725^2 + 80476^2 .

It is a cyclic number.

It is not a de Polignac number, because 121211012201 - 2³⁰ = 120137270377 is a prime.

It is not a weakly prime, because it can be changed into another prime (121211012261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605506100 + 60605506101.

It is an arithmetic number, because the mean of its divisors is an integer number (60605506101).

Almost surely, 2^121211012201 is an apocalyptic number.

It is an amenable number.

121211012201 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211012201 is an equidigital number, since it uses as much as digits as its factorization.

121211012201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121211012201 its reverse (102210112121), we get a palindrome (223421124322).

The spelling of 121211012201 in words is "one hundred twenty-one billion, two hundred eleven million, twelve thousand, two hundred one".