21036123114 has 16 divisors (see below), whose sum is σ = 42127832928. Its totient is φ = 7002776592.

The previous prime is 21036123109. The next prime is 21036123133. The reversal of 21036123114 is 41132163012.

It is a happy number.

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, 2311192 + ... + 2320275.

It is an arithmetic number, because the mean of its divisors is an integer number (2632989558).

Almost surely, 2^21036123114 is an apocalyptic number.

21036123114 is an abundant number, since it is smaller than the sum of its proper divisors (21091709814).

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

21036123114 is a wasteful number, since it uses less digits than its factorization.

21036123114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4632229.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21036123114 its reverse (41132163012), we get a palindrome (62168286126).

The spelling of 21036123114 in words is "twenty-one billion, thirty-six million, one hundred twenty-three thousand, one hundred fourteen".