121221020210212 has 24 divisors (see below), whose sum is σ = 235824515747072. Its totient is φ = 54143383716000.

The previous prime is 121221020210201. The next prime is 121221020210219. The reversal of 121221020210212 is 212012020122121.

It is a self number, because there is not a number n which added to its sum of digits gives 121221020210212.

It is not an unprimeable number, because it can be changed into a prime (121221020210219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37599570414 + ... + 37599573637.

Almost surely, 2^{121221020210212} is an apocalyptic number.

It is an amenable number.

121221020210212 is a deficient number, since it is larger than the sum of its proper divisors (114603495536860).

121221020210212 is a wasteful number, since it uses less digits than its factorization.

121221020210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75199144099 (or 75199144097 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121221020210212 its reverse (212012020122121), we get a palindrome (333233040332333).

The spelling of 121221020210212 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred ten thousand, two hundred twelve".