21025373101 has 16 divisors (see below), whose sum is σ = 22399196544. Its totient is φ = 19666980864.

The previous prime is 21025373093. The next prime is 21025373107. The reversal of 21025373101 is 10137352012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21025373101 - 2³ = 21025373093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21025373107) 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, 4285816 + ... + 4290718.

It is an arithmetic number, because the mean of its divisors is an integer number (1399949784).

Almost surely, 2^21025373101 is an apocalyptic number.

It is an amenable number.

21025373101 is a deficient number, since it is larger than the sum of its proper divisors (1373823443).

21025373101 is a wasteful number, since it uses less digits than its factorization.

21025373101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6420.

The product of its (nonzero) digits is 1260, while the sum is 25.

The spelling of 21025373101 in words is "twenty-one billion, twenty-five million, three hundred seventy-three thousand, one hundred one".