1306055621421 has 16 divisors (see below), whose sum is σ = 1952980372800. Its totient is φ = 862566327504.

The previous prime is 1306055621417. The next prime is 1306055621461. The reversal of 1306055621421 is 1241265506031.

1306055621421 is a `hidden beast` number, since 1 + 3 + 0 + 6 + 0 + 5 + 5 + 621 + 4 + 21 = 666.

It is not a de Polignac number, because 1306055621421 - 2² = 1306055621417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306055621401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226036506 + ... + 226042283.

It is an arithmetic number, because the mean of its divisors is an integer number (122061273300).

Almost surely, 2^{1306055621421} is an apocalyptic number.

It is an amenable number.

1306055621421 is a deficient number, since it is larger than the sum of its proper divisors (646924751379).

1306055621421 is a wasteful number, since it uses less digits than its factorization.

1306055621421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452078905 (or 452078899 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 1306055621421 in words is "one trillion, three hundred six billion, fifty-five million, six hundred twenty-one thousand, four hundred twenty-one".