21434021142220 has 12 divisors (see below), whose sum is σ = 45011444398704. Its totient is φ = 8573608456880.

The previous prime is 21434021142217. The next prime is 21434021142253. The reversal of 21434021142220 is 2224112043412.

It is a super-3 number, since 3×21434021142220³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535850528536 + ... + 535850528575.

It is an arithmetic number, because the mean of its divisors is an integer number (3750953699892).

Almost surely, 2^{21434021142220} is an apocalyptic number.

21434021142220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21434021142220 is an abundant number, since it is smaller than the sum of its proper divisors (23577423256484).

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

21434021142220 is a wasteful number, since it uses less digits than its factorization.

21434021142220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071701057120 (or 1071701057118 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21434021142220 its reverse (2224112043412), we get a palindrome (23658133185632).

The spelling of 21434021142220 in words is "twenty-one trillion, four hundred thirty-four billion, twenty-one million, one hundred forty-two thousand, two hundred twenty".