21141210020 has 24 divisors (see below), whose sum is σ = 50738904384. Its totient is φ = 7248414816.

The previous prime is 21141210007. The next prime is 21141210037. The reversal of 21141210020 is 2001214112.

It is a happy number.

It is a super-2 number, since 2×21141210020² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21141209977 and 21141210004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75504182 + ... + 75504461.

It is an arithmetic number, because the mean of its divisors is an integer number (2114121016).

Almost surely, 2^21141210020 is an apocalyptic number.

21141210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21141210020 is an abundant number, since it is smaller than the sum of its proper divisors (29597694364).

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

21141210020 is a wasteful number, since it uses less digits than its factorization.

21141210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151008659 (or 151008657 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21141210020 its reverse (2001214112), we get a palindrome (23142424132).

The spelling of 21141210020 in words is "twenty-one billion, one hundred forty-one million, two hundred ten thousand, twenty".