220121311021 has 64 divisors (see below), whose sum is σ = 252886233600. Its totient is φ = 190356480000.

The previous prime is 220121310991. The next prime is 220121311031. The reversal of 220121311021 is 120113121022.

It is not a de Polignac number, because 220121311021 - 2¹¹ = 220121308973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220121310986 and 220121311004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220121311031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 366258121 + ... + 366258721.

It is an arithmetic number, because the mean of its divisors is an integer number (3951347400).

Almost surely, 2^220121311021 is an apocalyptic number.

It is an amenable number.

220121311021 is a deficient number, since it is larger than the sum of its proper divisors (32764922579).

220121311021 is a wasteful number, since it uses less digits than its factorization.

220121311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 220121311021 its reverse (120113121022), we get a palindrome (340234432043).

The spelling of 220121311021 in words is "two hundred twenty billion, one hundred twenty-one million, three hundred eleven thousand, twenty-one".