220121020019 has 4 divisors (see below), whose sum is σ = 220124062800. Its totient is φ = 220117977240.

The previous prime is 220121019997. The next prime is 220121020033. The reversal of 220121020019 is 910020121022.

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 220121020019 - 2¹⁶ = 220120954483 is a prime.

It is a super-2 number, since 2×220121020019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220121020039) 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, 1410167 + ... + 1558464.

It is an arithmetic number, because the mean of its divisors is an integer number (55031015700).

Almost surely, 2^220121020019 is an apocalyptic number.

220121020019 is a deficient number, since it is larger than the sum of its proper divisors (3042781).

220121020019 is an equidigital number, since it uses as much as digits as its factorization.

220121020019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3042780.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 220121020019 in words is "two hundred twenty billion, one hundred twenty-one million, twenty thousand, nineteen".