210121021010011 has 4 divisors (see below), whose sum is σ = 213080472010224. Its totient is φ = 207161570009800.

The previous prime is 210121021009997. The next prime is 210121021010027. The reversal of 210121021010011 is 110010120121012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 210121021010011 - 2²⁷ = 210120886792283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210121021009973 and 210121021010000.

It is not an unprimeable number, because it can be changed into a prime (210121021010911) 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, 1479725500000 + ... + 1479725500141.

It is an arithmetic number, because the mean of its divisors is an integer number (53270118002556).

Almost surely, 2^{210121021010011} is an apocalyptic number.

210121021010011 is a deficient number, since it is larger than the sum of its proper divisors (2959451000213).

210121021010011 is an equidigital number, since it uses as much as digits as its factorization.

210121021010011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2959451000212.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 210121021010011 its reverse (110010120121012), we get a palindrome (320131141131023).

The spelling of 210121021010011 in words is "two hundred ten trillion, one hundred twenty-one billion, twenty-one million, ten thousand, eleven".