121010211000000 has 588 divisors, whose sum is σ = 495499516587504. Its totient is φ = 27659462400000.

The previous prime is 121010210999987. The next prime is 121010211000001. The reversal of 121010211000000 is 112010121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is not an unprimeable number, because it can be changed into a prime (121010211000001) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 62039602 + ... + 63960398.

Almost surely, 2^{121010211000000} is an apocalyptic number.

121010211000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121010211000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247749758293752).

121010211000000 is an abundant number, since it is smaller than the sum of its proper divisors (374489305587504).

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

121010211000000 is an frugal number, since it uses more digits than its factorization.

121010211000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920852 (or 1920814 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 121010211000000 its reverse (112010121), we get a palindrome (121010323010121).

The spelling of 121010211000000 in words is "one hundred twenty-one trillion, ten billion, two hundred eleven million", and thus it is an aban number.