1211222102121 has 24 divisors (see below), whose sum is σ = 1825976880000. Its totient is φ = 772218349056.

The previous prime is 1211222102119. The next prime is 1211222102159. The reversal of 1211222102121 is 1212012221121.

1211222102121 is a `hidden beast` number, since 121 + 122 + 210 + 212 + 1 = 666.

It is not a de Polignac number, because 1211222102121 - 2¹ = 1211222102119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211222102094 and 1211222102103.

It is not an unprimeable number, because it can be changed into a prime (1211222102521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 449545 + ... + 1620041.

It is an arithmetic number, because the mean of its divisors is an integer number (76082370000).

Almost surely, 2^{1211222102121} is an apocalyptic number.

It is an amenable number.

1211222102121 is a deficient number, since it is larger than the sum of its proper divisors (614754777879).

1211222102121 is a wasteful number, since it uses less digits than its factorization.

1211222102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175525 (or 1175522 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1211222102121 its reverse (1212012221121), we get a palindrome (2423234323242).

The spelling of 1211222102121 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, one hundred two thousand, one hundred twenty-one".