121211220200201 has 16 divisors (see below), whose sum is σ = 122617293598800. Its totient is φ = 119814448408320.

The previous prime is 121211220200183. The next prime is 121211220200243. The reversal of 121211220200201 is 102002022112121.

It can be written as a sum of positive squares in 8 ways, for example, as 44979811476601 + 76231408723600 = 6706699^2 + 8731060^2 .

It is a cyclic number.

It is not a de Polignac number, because 121211220200201 - 2⁶ = 121211220200137 is a prime.

It is a super-2 number, since 2×121211220200201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121211220200201.

It is not an unprimeable number, because it can be changed into a prime (121211220200401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23255531 + ... + 27986463.

It is an arithmetic number, because the mean of its divisors is an integer number (7663580849925).

Almost surely, 2^{121211220200201} is an apocalyptic number.

It is an amenable number.

121211220200201 is a deficient number, since it is larger than the sum of its proper divisors (1406073398599).

121211220200201 is a wasteful number, since it uses less digits than its factorization.

121211220200201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4731916.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121211220200201 its reverse (102002022112121), we get a palindrome (223213242312322).

The spelling of 121211220200201 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred twenty million, two hundred thousand, two hundred one".