212221011122021 has 48 divisors (see below), whose sum is σ = 247992785476800. Its totient is φ = 180952263360000.

The previous prime is 212221011121969. The next prime is 212221011122053. The reversal of 212221011122021 is 120221110122212.

It is not a de Polignac number, because 212221011122021 - 2²² = 212221006927717 is a prime.

It is a super-2 number, since 2×212221011122021² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212221011121984 and 212221011122002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221011122221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5855808461 + ... + 5855844701.

It is an arithmetic number, because the mean of its divisors is an integer number (5166516364100).

Almost surely, 2^{212221011122021} is an apocalyptic number.

It is an amenable number.

212221011122021 is a deficient number, since it is larger than the sum of its proper divisors (35771774354779).

212221011122021 is a wasteful number, since it uses less digits than its factorization.

212221011122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61602 (or 61591 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212221011122021 its reverse (120221110122212), we get a palindrome (332442121244233).

It can be divided in two parts, 2122210 and 11122021, that added together give a palindrome (13244231).

The spelling of 212221011122021 in words is "two hundred twelve trillion, two hundred twenty-one billion, eleven million, one hundred twenty-two thousand, twenty-one".