121020212000 has 96 divisors (see below), whose sum is σ = 314837817840. Its totient is φ = 45560524800.

The previous prime is 121020211999. The next prime is 121020212003. The reversal of 121020212000 is 212020121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 7480866064 + 113539345936 = 86492^2 + 336956^2 .

It is not an unprimeable number, because it can be changed into a prime (121020212003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 821855 + ... + 957854.

Almost surely, 2^121020212000 is an apocalyptic number.

121020212000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121020212000 is an abundant number, since it is smaller than the sum of its proper divisors (193817605840).

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

121020212000 is a wasteful number, since it uses less digits than its factorization.

121020212000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779751 (or 1779733 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 121020212000 its reverse (212020121), we get a palindrome (121232232121).

The spelling of 121020212000 in words is "one hundred twenty-one billion, twenty million, two hundred twelve thousand".