220212212110021 has 4 divisors (see below), whose sum is σ = 222270270167232. Its totient is φ = 218154154052812.

The previous prime is 220212212109983. The next prime is 220212212110061. The reversal of 220212212110021 is 120011212212022.

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 not a de Polignac number, because 220212212110021 - 2¹³ = 220212212101829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220212212110061) 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, 1029029028445 + ... + 1029029028658.

It is an arithmetic number, because the mean of its divisors is an integer number (55567567541808).

Almost surely, 2^{220212212110021} is an apocalyptic number.

It is an amenable number.

220212212110021 is a deficient number, since it is larger than the sum of its proper divisors (2058058057211).

220212212110021 is a wasteful number, since it uses less digits than its factorization.

220212212110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058058057210.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 220212212110021 its reverse (120011212212022), we get a palindrome (340223424322043).

The spelling of 220212212110021 in words is "two hundred twenty trillion, two hundred twelve billion, two hundred twelve million, one hundred ten thousand, twenty-one".