1221012101300 has 18 divisors (see below), whose sum is σ = 2649596260038. Its totient is φ = 488404840480.

The previous prime is 1221012101291. The next prime is 1221012101339. The reversal of 1221012101300 is 31012101221.

It can be written as a sum of positive squares in 3 ways, for example, as 341310671524 + 879701429776 = 584218^2 + 937924^2 .

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, 6105060407 + ... + 6105060606.

Almost surely, 2^{1221012101300} is an apocalyptic number.

1221012101300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221012101300 is an abundant number, since it is smaller than the sum of its proper divisors (1428584158738).

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

1221012101300 is a wasteful number, since it uses less digits than its factorization.

1221012101300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12210121027 (or 12210121020 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1221012101300 its reverse (31012101221), we get a palindrome (1252024202521).

The spelling of 1221012101300 in words is "one trillion, two hundred twenty-one billion, twelve million, one hundred one thousand, three hundred".