121211201021000 has 64 divisors (see below), whose sum is σ = 283770381473280. Its totient is φ = 48461203300800.

The previous prime is 121211201020907. The next prime is 121211201021039. The reversal of 121211201021000 is 120102112121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27012344 + ... + 31178343.

It is an arithmetic number, because the mean of its divisors is an integer number (4433912210520).

Almost surely, 2^{121211201021000} is an apocalyptic number.

121211201021000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121211201021000 is an abundant number, since it is smaller than the sum of its proper divisors (162559180452280).

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

121211201021000 is a wasteful number, since it uses less digits than its factorization.

121211201021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58192791 (or 58192777 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121211201021000 its reverse (120102112121), we get a palindrome (121331303133121).

The spelling of 121211201021000 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred one million, twenty-one thousand".