121211021201 has 4 divisors (see below), whose sum is σ = 122136296304. Its totient is φ = 120285746100.

The previous prime is 121211021161. The next prime is 121211021249. The reversal of 121211021201 is 102120112121.

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: 102120112121 = 47 ⋅2172768343.

It is a cyclic number.

It is not a de Polignac number, because 121211021201 - 2⁶ = 121211021137 is a prime.

It is a super-2 number, since 2×121211021201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121211021401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462637355 + ... + 462637616.

It is an arithmetic number, because the mean of its divisors is an integer number (30534074076).

Almost surely, 2^121211021201 is an apocalyptic number.

It is an amenable number.

121211021201 is a deficient number, since it is larger than the sum of its proper divisors (925275103).

121211021201 is an equidigital number, since it uses as much as digits as its factorization.

121211021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925275102.

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

Adding to 121211021201 its reverse (102120112121), we get a palindrome (223331133322).

It can be divided in two parts, 12121 and 1021201, that multiplied together give a palindrome (12377977321).

The spelling of 121211021201 in words is "one hundred twenty-one billion, two hundred eleven million, twenty-one thousand, two hundred one".