121211200010 has 16 divisors (see below), whose sum is σ = 225218230272. Its totient is φ = 46920464400.

The previous prime is 121211199983. The next prime is 121211200039. The reversal of 121211200010 is 10002112121.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121211199964 and 121211200000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195501626 + ... + 195502245.

It is an arithmetic number, because the mean of its divisors is an integer number (14076139392).

Almost surely, 2^121211200010 is an apocalyptic number.

121211200010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121211200010 is a deficient number, since it is larger than the sum of its proper divisors (104007030262).

121211200010 is a wasteful number, since it uses less digits than its factorization.

121211200010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391003909.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121211200010 its reverse (10002112121), we get a palindrome (131213312131).

The spelling of 121211200010 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred thousand, ten".