1210013200021 has 4 divisors (see below), whose sum is σ = 1210041284544. Its totient is φ = 1209985115500.

The previous prime is 1210013200007. The next prime is 1210013200049. The reversal of 1210013200021 is 1200023100121.

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 1210013200021 - 2⁹ = 1210013199509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210013199974 and 1210013200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210013200091) 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, 13977535 + ... + 14063836.

It is an arithmetic number, because the mean of its divisors is an integer number (302510321136).

Almost surely, 2^{1210013200021} is an apocalyptic number.

It is an amenable number.

1210013200021 is a deficient number, since it is larger than the sum of its proper divisors (28084523).

1210013200021 is an equidigital number, since it uses as much as digits as its factorization.

1210013200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28084522.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1210013200021 its reverse (1200023100121), we get a palindrome (2410036300142).

The spelling of 1210013200021 in words is "one trillion, two hundred ten billion, thirteen million, two hundred thousand, twenty-one".