214917851421 has 128 divisors (see below), whose sum is σ = 402326077440. Its totient is φ = 110364954624.

The previous prime is 214917851413. The next prime is 214917851429. The reversal of 214917851421 is 124158719412.

It is a happy number.

214917851421 is a `hidden beast` number, since 2 + 1 + 4 + 9 + 178 + 51 + 421 = 666.

It is an interprime number because it is at equal distance from previous prime (214917851413) and next prime (214917851429).

It is not a de Polignac number, because 214917851421 - 2³ = 214917851413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214917851429) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 22282626 + ... + 22292268.

It is an arithmetic number, because the mean of its divisors is an integer number (3143172480).

Almost surely, 2^214917851421 is an apocalyptic number.

214917851421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

214917851421 is a deficient number, since it is larger than the sum of its proper divisors (187408226019).

214917851421 is a wasteful number, since it uses less digits than its factorization.

214917851421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9912 (or 9906 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The spelling of 214917851421 in words is "two hundred fourteen billion, nine hundred seventeen million, eight hundred fifty-one thousand, four hundred twenty-one".