102121212201211 has 64 divisors (see below), whose sum is σ = 133611316715520. Its totient is φ = 75956330672640.

The previous prime is 102121212201209. The next prime is 102121212201271. The reversal of 102121212201211 is 112102212121201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 102121212201211 - 2¹ = 102121212201209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (102121212201271) 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, 8512426 + ... + 16634416.

It is an arithmetic number, because the mean of its divisors is an integer number (2087676823680).

Almost surely, 2^{102121212201211} is an apocalyptic number.

102121212201211 is a deficient number, since it is larger than the sum of its proper divisors (31490104514309).

102121212201211 is a wasteful number, since it uses less digits than its factorization.

102121212201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8122184.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 102121212201211 its reverse (112102212121201), we get a palindrome (214223424322412).

The spelling of 102121212201211 in words is "one hundred two trillion, one hundred twenty-one billion, two hundred twelve million, two hundred one thousand, two hundred eleven".