10101102021 has 12 divisors (see below), whose sum is σ = 14837777760. Its totient is φ = 6619930920.

The previous prime is 10101101963. The next prime is 10101102023. The reversal of 10101102021 is 12020110101.

It is a happy number.

It is not a de Polignac number, because 10101102021 - 2⁶ = 10101101957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10101101994 and 10101102012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101102023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9510865 + ... + 9511926.

It is an arithmetic number, because the mean of its divisors is an integer number (1236481480).

Almost surely, 2^10101102021 is an apocalyptic number.

It is an amenable number.

10101102021 is a deficient number, since it is larger than the sum of its proper divisors (4736675739).

10101102021 is a wasteful number, since it uses less digits than its factorization.

10101102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19022856 (or 19022853 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10101102021 its reverse (12020110101), we get a palindrome (22121212122).

The spelling of 10101102021 in words is "ten billion, one hundred one million, one hundred two thousand, twenty-one".