1421151019956 has 36 divisors (see below), whose sum is σ = 3592445151204. Its totient is φ = 473704982400.

The previous prime is 1421151019909. The next prime is 1421151019997. The reversal of 1421151019956 is 6599101511241.

1421151019956 is a `hidden beast` number, since 1 + 42 + 1 + 1 + 510 + 1 + 9 + 95 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1113691859856 + 307459160100 = 1055316^2 + 554490^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1421151019956² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 998446 + ... + 1959386.

It is an arithmetic number, because the mean of its divisors is an integer number (99790143089).

Almost surely, 2^{1421151019956} is an apocalyptic number.

It is an amenable number.

1421151019956 is an abundant number, since it is smaller than the sum of its proper divisors (2171294131248).

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

1421151019956 is a wasteful number, since it uses less digits than its factorization.

1421151019956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002032 (or 1002027 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 45.

The spelling of 1421151019956 in words is "one trillion, four hundred twenty-one billion, one hundred fifty-one million, nineteen thousand, nine hundred fifty-six".