1011202100021 has 8 divisors (see below), whose sum is σ = 1064713291200. Its totient is φ = 957719911680.

The previous prime is 1011202100017. The next prime is 1011202100033. The reversal of 1011202100021 is 1200012021101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1011202100021 - 2² = 1011202100017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011202099975 and 1011202100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011202102021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7179116 + ... + 7318613.

It is an arithmetic number, because the mean of its divisors is an integer number (133089161400).

Almost surely, 2^{1011202100021} is an apocalyptic number.

It is an amenable number.

1011202100021 is a deficient number, since it is larger than the sum of its proper divisors (53511191179).

1011202100021 is a wasteful number, since it uses less digits than its factorization.

1011202100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14501419.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1011202100021 its reverse (1200012021101), we get a palindrome (2211214121122).

The spelling of 1011202100021 in words is "one trillion, eleven billion, two hundred two million, one hundred thousand, twenty-one".