21114121420 has 48 divisors (see below), whose sum is σ = 51368079168. Its totient is φ = 7139957760.

The previous prime is 21114121409. The next prime is 21114121423. The reversal of 21114121420 is 2412141112.

It is a happy number.

It is a super-2 number, since 2×21114121420² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21114121423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1022761 + ... + 1043200.

It is an arithmetic number, because the mean of its divisors is an integer number (1070168316).

Almost surely, 2^21114121420 is an apocalyptic number.

21114121420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21114121420 is an abundant number, since it is smaller than the sum of its proper divisors (30253957748).

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

21114121420 is a wasteful number, since it uses less digits than its factorization.

21114121420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066050 (or 2066048 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21114121420 its reverse (2412141112), we get a palindrome (23526262532).

The spelling of 21114121420 in words is "twenty-one billion, one hundred fourteen million, one hundred twenty-one thousand, four hundred twenty".