121201213210 has 128 divisors (see below), whose sum is σ = 288537624576. Its totient is φ = 35487728640.

The previous prime is 121201213201. The next prime is 121201213247. The reversal of 121201213210 is 12312102121.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7151767 + ... + 7168693.

It is an arithmetic number, because the mean of its divisors is an integer number (2254200192).

Almost surely, 2^121201213210 is an apocalyptic number.

121201213210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121201213210 is an abundant number, since it is smaller than the sum of its proper divisors (167336411366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121201213210 is a wasteful number, since it uses less digits than its factorization.

121201213210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17516.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121201213210 its reverse (12312102121), we get a palindrome (133513315331).

The spelling of 121201213210 in words is "one hundred twenty-one billion, two hundred one million, two hundred thirteen thousand, two hundred ten".