21100022010997 has 16 divisors (see below), whose sum is σ = 22632080555520. Its totient is φ = 19610198712000.

The previous prime is 21100022010973. The next prime is 21100022011007. The reversal of 21100022010997 is 79901022000112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21100022010997 - 2⁷ = 21100022010869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100022010937) 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, 8149372 + ... + 10421722.

It is an arithmetic number, because the mean of its divisors is an integer number (1414505034720).

Almost surely, 2^{21100022010997} is an apocalyptic number.

It is an amenable number.

21100022010997 is a deficient number, since it is larger than the sum of its proper divisors (1532058544523).

21100022010997 is a wasteful number, since it uses less digits than its factorization.

21100022010997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281644.

The product of its (nonzero) digits is 4536, while the sum is 34.

The spelling of 21100022010997 in words is "twenty-one trillion, one hundred billion, twenty-two million, ten thousand, nine hundred ninety-seven".