1421899121265 has 32 divisors (see below), whose sum is σ = 2600381473536. Its totient is φ = 649926685440.

The previous prime is 1421899121173. The next prime is 1421899121323. The reversal of 1421899121265 is 5621219981241.

It is a happy number.

It is not a de Polignac number, because 1421899121265 - 2¹¹ = 1421899119217 is a prime.

It is a super-2 number, since 2×1421899121265² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61882 + ... + 1687491.

It is an arithmetic number, because the mean of its divisors is an integer number (81261921048).

Almost surely, 2^{1421899121265} is an apocalyptic number.

1421899121265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1421899121265 is a deficient number, since it is larger than the sum of its proper divisors (1178482352271).

1421899121265 is a wasteful number, since it uses less digits than its factorization.

1421899121265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757129.

The product of its digits is 622080, while the sum is 51.

The spelling of 1421899121265 in words is "one trillion, four hundred twenty-one billion, eight hundred ninety-nine million, one hundred twenty-one thousand, two hundred sixty-five".