1102121120021 has 4 divisors (see below), whose sum is σ = 1102201704000. Its totient is φ = 1102040536044.

The previous prime is 1102121120017. The next prime is 1102121120027. The reversal of 1102121120021 is 1200211212011.

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 not a de Polignac number, because 1102121120021 - 2² = 1102121120017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1102121119978 and 1102121120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102121120027) 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, 40271471 + ... + 40298828.

It is an arithmetic number, because the mean of its divisors is an integer number (275550426000).

Almost surely, 2^{1102121120021} is an apocalyptic number.

It is an amenable number.

1102121120021 is a deficient number, since it is larger than the sum of its proper divisors (80583979).

1102121120021 is an equidigital number, since it uses as much as digits as its factorization.

1102121120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80583978.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1102121120021 its reverse (1200211212011), we get a palindrome (2302332332032).

The spelling of 1102121120021 in words is "one trillion, one hundred two billion, one hundred twenty-one million, one hundred twenty thousand, twenty-one".