1214421021 has 12 divisors (see below), whose sum is σ = 1913633280. Its totient is φ = 736012680.

The previous prime is 1214421017. The next prime is 1214421049. The reversal of 1214421021 is 1201244121.

1214421021 is a `hidden beast` number, since 121 + 442 + 102 + 1 = 666.

It is not a de Polignac number, because 1214421021 - 2² = 1214421017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1214420985 and 1214421003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214421521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6133341 + ... + 6133538.

It is an arithmetic number, because the mean of its divisors is an integer number (159469440).

Almost surely, 2^1214421021 is an apocalyptic number.

1214421021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1214421021 is a deficient number, since it is larger than the sum of its proper divisors (699212259).

1214421021 is a wasteful number, since it uses less digits than its factorization.

1214421021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12266896 (or 12266893 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1214421021 is about 34848.5440298443. The cubic root of 1214421021 is about 1066.8984692294.

Adding to 1214421021 its reverse (1201244121), we get a palindrome (2415665142).

Subtracting from 1214421021 its reverse (1201244121), we obtain a square (13176900 = 3630²).

The spelling of 1214421021 in words is "one billion, two hundred fourteen million, four hundred twenty-one thousand, twenty-one".