21420112010 has 32 divisors (see below), whose sum is σ = 42086094912. Its totient is φ = 7784542080.

The previous prime is 21420111949. The next prime is 21420112057. The reversal of 21420112010 is 1021102412.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133022 + ... + 246038.

It is an arithmetic number, because the mean of its divisors is an integer number (1315190466).

Almost surely, 2^21420112010 is an apocalyptic number.

21420112010 is a deficient number, since it is larger than the sum of its proper divisors (20665982902).

21420112010 is a wasteful number, since it uses less digits than its factorization.

21420112010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114758.

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

Adding to 21420112010 its reverse (1021102412), we get a palindrome (22441214422).

The spelling of 21420112010 in words is "twenty-one billion, four hundred twenty million, one hundred twelve thousand, ten".