1102100021021 has 4 divisors (see below), whose sum is σ = 1127730254112. Its totient is φ = 1076469787932.

The previous prime is 1102100020993. The next prime is 1102100021023. The reversal of 1102100021021 is 1201200012011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1102100021021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1102100020993 and 1102100021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102100021023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12815116481 + ... + 12815116566.

It is an arithmetic number, because the mean of its divisors is an integer number (281932563528).

Almost surely, 2^{1102100021021} is an apocalyptic number.

It is an amenable number.

1102100021021 is a deficient number, since it is larger than the sum of its proper divisors (25630233091).

1102100021021 is an equidigital number, since it uses as much as digits as its factorization.

1102100021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25630233090.

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

Adding to 1102100021021 its reverse (1201200012011), we get a palindrome (2303300033032).

The spelling of 1102100021021 in words is "one trillion, one hundred two billion, one hundred million, twenty-one thousand, twenty-one".