121221020201210 has 96 divisors (see below), whose sum is σ = 237660069040128. Its totient is φ = 44482065131520.

The previous prime is 121221020201201. The next prime is 121221020201287. The reversal of 121221020201210 is 12102020122121.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 128328047 + ... + 129269213.

It is an arithmetic number, because the mean of its divisors is an integer number (2475625719168).

Almost surely, 2^{121221020201210} is an apocalyptic number.

121221020201210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221020201210 is a deficient number, since it is larger than the sum of its proper divisors (116439048838918).

121221020201210 is a wasteful number, since it uses less digits than its factorization.

121221020201210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942336 (or 942319 counting only the distinct ones).

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

Adding to 121221020201210 its reverse (12102020122121), we get a palindrome (133323040323331).

The spelling of 121221020201210 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred one thousand, two hundred ten".