221220212022011 has 16 divisors (see below), whose sum is σ = 222535748791968. Its totient is φ = 219907226246400.

The previous prime is 221220212021989. The next prime is 221220212022037. The reversal of 221220212022011 is 110220212022122.

It is not a de Polignac number, because 221220212022011 - 2¹⁴ = 221220212005627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221220212022911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4519008311 + ... + 4519057263.

It is an arithmetic number, because the mean of its divisors is an integer number (13908484299498).

Almost surely, 2^{221220212022011} is an apocalyptic number.

221220212022011 is a deficient number, since it is larger than the sum of its proper divisors (1315536769957).

221220212022011 is a wasteful number, since it uses less digits than its factorization.

221220212022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74462.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221220212022011 its reverse (110220212022122), we get a palindrome (331440424044133).

The spelling of 221220212022011 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred twelve million, twenty-two thousand, eleven".