21213002440422 has 48 divisors (see below), whose sum is σ = 52408594274400. Its totient is φ = 6143131927296.

The previous prime is 21213002440381. The next prime is 21213002440463. The reversal of 21213002440422 is 22404420031212.

It is a happy number.

21213002440422 is a `hidden beast` number, since 2 + 1 + 213 + 0 + 0 + 2 + 440 + 4 + 2 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (21213002440381) and next prime (21213002440463).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2666285922 + ... + 2666293877.

It is an arithmetic number, because the mean of its divisors is an integer number (1091845714050).

Almost surely, 2^{21213002440422} is an apocalyptic number.

21213002440422 is an abundant number, since it is smaller than the sum of its proper divisors (31195591833978).

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

21213002440422 is a wasteful number, since it uses less digits than its factorization.

21213002440422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332579837 (or 5332579834 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21213002440422 its reverse (22404420031212), we get a palindrome (43617422471634).

The spelling of 21213002440422 in words is "twenty-one trillion, two hundred thirteen billion, two million, four hundred forty thousand, four hundred twenty-two".