10002120213021 has 16 divisors (see below), whose sum is σ = 13341730444224. Its totient is φ = 6665295377664.

The previous prime is 10002120212927. The next prime is 10002120213091. The reversal of 10002120213021 is 12031202120001.

It is not a de Polignac number, because 10002120213021 - 2¹³ = 10002120204829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002120213091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183440655 + ... + 183495171.

It is an arithmetic number, because the mean of its divisors is an integer number (833858152764).

Almost surely, 2^{10002120213021} is an apocalyptic number.

It is an amenable number.

10002120213021 is a deficient number, since it is larger than the sum of its proper divisors (3339610231203).

10002120213021 is a wasteful number, since it uses less digits than its factorization.

10002120213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78940.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 10002120213021 its reverse (12031202120001), we get a palindrome (22033322333022).

The spelling of 10002120213021 in words is "ten trillion, two billion, one hundred twenty million, two hundred thirteen thousand, twenty-one".