421018754981 has 16 divisors (see below), whose sum is σ = 461784036480. Its totient is φ = 380674183680.

The previous prime is 421018754977. The next prime is 421018755007. The reversal of 421018754981 is 189457810124.

It is a cyclic number.

It is not a de Polignac number, because 421018754981 - 2² = 421018754977 is a prime.

It is a super-2 number, since 2×421018754981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421018754281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1377320 + ... + 1655006.

It is an arithmetic number, because the mean of its divisors is an integer number (28861502280).

Almost surely, 2^421018754981 is an apocalyptic number.

It is an amenable number.

421018754981 is a deficient number, since it is larger than the sum of its proper divisors (40765281499).

421018754981 is a wasteful number, since it uses less digits than its factorization.

421018754981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278444.

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 421018754981 in words is "four hundred twenty-one billion, eighteen million, seven hundred fifty-four thousand, nine hundred eighty-one".