220100021012021 has 4 divisors (see below), whose sum is σ = 220100127097344. Its totient is φ = 220099914926700.

The previous prime is 220100021011963. The next prime is 220100021012087. The reversal of 220100021012021 is 120210120001022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220100021012021 is a prime.

It is a super-3 number, since 3×220100021012021³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220100021011987 and 220100021012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220100821012021) 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, 49867175 + ... + 54101156.

It is an arithmetic number, because the mean of its divisors is an integer number (55025031774336).

Almost surely, 2^{220100021012021} is an apocalyptic number.

It is an amenable number.

220100021012021 is a deficient number, since it is larger than the sum of its proper divisors (106085323).

220100021012021 is a wasteful number, since it uses less digits than its factorization.

220100021012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106085322.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 220100021012021 its reverse (120210120001022), we get a palindrome (340310141013043).

The spelling of 220100021012021 in words is "two hundred twenty trillion, one hundred billion, twenty-one million, twelve thousand, twenty-one".