1211202102121 has 64 divisors (see below), whose sum is σ = 1443814732800. Its totient is φ = 1004215968000.

The previous prime is 1211202102023. The next prime is 1211202102203. The reversal of 1211202102121 is 1212012021121.

It is not a de Polignac number, because 1211202102121 - 2⁹ = 1211202101609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211202102095 and 1211202102104.

It is not an unprimeable number, because it can be changed into a prime (1211202108121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 207857410 + ... + 207863236.

It is an arithmetic number, because the mean of its divisors is an integer number (22559605200).

Almost surely, 2^{1211202102121} is an apocalyptic number.

1211202102121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211202102121 is a deficient number, since it is larger than the sum of its proper divisors (232612630679).

1211202102121 is a wasteful number, since it uses less digits than its factorization.

1211202102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6230.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1211202102121 its reverse (1212012021121), we get a palindrome (2423214123242).

The spelling of 1211202102121 in words is "one trillion, two hundred eleven billion, two hundred two million, one hundred two thousand, one hundred twenty-one".