1210121320212 has 384 divisors, whose sum is σ = 3836242206720. Its totient is φ = 322368076800.

The previous prime is 1210121320211. The next prime is 1210121320231. The reversal of 1210121320212 is 2120231210121.

1210121320212 is a `hidden beast` number, since 1 + 2 + 10 + 121 + 320 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210121320211) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 449356738 + ... + 449359430.

It is an arithmetic number, because the mean of its divisors is an integer number (9990214080).

Almost surely, 2^{1210121320212} is an apocalyptic number.

1210121320212 is a gapful number since it is divisible by the number (12) 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 1210121320212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1918121103360).

1210121320212 is an abundant number, since it is smaller than the sum of its proper divisors (2626120886508).

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

1210121320212 is a wasteful number, since it uses less digits than its factorization.

1210121320212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380 (or 3372 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1210121320212 its reverse (2120231210121), we get a palindrome (3330352530333).

The spelling of 1210121320212 in words is "one trillion, two hundred ten billion, one hundred twenty-one million, three hundred twenty thousand, two hundred twelve".