201021211210120 has 128 divisors (see below), whose sum is σ = 518656605845760. Its totient is φ = 68689198955520.

The previous prime is 201021211210111. The next prime is 201021211210181. The reversal of 201021211210120 is 21012112120102.

It is a junction number, because it is equal to n+sod(n) for n = 201021211210094 and 201021211210103.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129396202 + ... + 130940518.

It is an arithmetic number, because the mean of its divisors is an integer number (4052004733170).

Almost surely, 2^{201021211210120} is an apocalyptic number.

201021211210120 is a gapful number since it is divisible by the number (20) 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 201021211210120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259328302922880).

201021211210120 is an abundant number, since it is smaller than the sum of its proper divisors (317635394635640).

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

201021211210120 is a wasteful number, since it uses less digits than its factorization.

201021211210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545903 (or 1545899 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201021211210120 its reverse (21012112120102), we get a palindrome (222033323330222).

The spelling of 201021211210120 in words is "two hundred one trillion, twenty-one billion, two hundred eleven million, two hundred ten thousand, one hundred twenty".