10020121111221 has 32 divisors (see below), whose sum is σ = 14494432095360. Its totient is φ = 6120576000000.

The previous prime is 10020121111201. The next prime is 10020121111267. The reversal of 10020121111221 is 12211112102001.

It is a happy number.

It is not a de Polignac number, because 10020121111221 - 2¹⁸ = 10020120849077 is a prime.

It is a super-2 number, since 2×10020121111221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10020121111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020121111201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25833721 + ... + 26218721.

It is an arithmetic number, because the mean of its divisors is an integer number (452951002980).

Almost surely, 2^{10020121111221} is an apocalyptic number.

It is an amenable number.

10020121111221 is a deficient number, since it is larger than the sum of its proper divisors (4474310984139).

10020121111221 is a wasteful number, since it uses less digits than its factorization.

10020121111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389957.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 10020121111221 its reverse (12211112102001), we get a palindrome (22231233213222).

The spelling of 10020121111221 in words is "ten trillion, twenty billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".