1021231300212 has 18 divisors (see below), whose sum is σ = 2581445786738. Its totient is φ = 340410433392.

The previous prime is 1021231300153. The next prime is 1021231300223. The reversal of 1021231300212 is 2120031321201.

It can be written as a sum of positive squares in only one way, i.e., 1018472529636 + 2758770576 = 1009194^2 + 52524^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14183768023 + ... + 14183768094.

Almost surely, 2^{1021231300212} is an apocalyptic number.

1021231300212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021231300212 is an abundant number, since it is smaller than the sum of its proper divisors (1560214486526).

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

1021231300212 is a wasteful number, since it uses less digits than its factorization.

1021231300212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28367536127 (or 28367536122 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1021231300212 its reverse (2120031321201), we get a palindrome (3141262621413).

The spelling of 1021231300212 in words is "one trillion, twenty-one billion, two hundred thirty-one million, three hundred thousand, two hundred twelve".