1021221010212 has 96 divisors (see below), whose sum is σ = 2583509410944. Its totient is φ = 312100992000.

The previous prime is 1021221010207. The next prime is 1021221010213. The reversal of 1021221010212 is 2120101221201.

It is a junction number, because it is equal to n+sod(n) for n = 1021221010191 and 1021221010200.

It is not an unprimeable number, because it can be changed into a prime (1021221010213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18442287 + ... + 18497577.

It is an arithmetic number, because the mean of its divisors is an integer number (26911556364).

Almost surely, 2^{1021221010212} is an apocalyptic number.

1021221010212 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 1021221010212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1291754705472).

1021221010212 is an abundant number, since it is smaller than the sum of its proper divisors (1562288400732).

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

1021221010212 is a wasteful number, since it uses less digits than its factorization.

1021221010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56109 (or 56107 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1021221010212 its reverse (2120101221201), we get a palindrome (3141322231413).

The spelling of 1021221010212 in words is "one trillion, twenty-one billion, two hundred twenty-one million, ten thousand, two hundred twelve".