2212122122021 has 12 divisors (see below), whose sum is σ = 2575946073888. Its totient is φ = 1894143823992.

The previous prime is 2212122121981. The next prime is 2212122122069. The reversal of 2212122122021 is 1202212212122.

It is a de Polignac number, because none of the positive numbers 2^k-2212122122021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212122121984 and 2212122122002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212122122081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23295611 + ... + 23390376.

It is an arithmetic number, because the mean of its divisors is an integer number (214662172824).

Almost surely, 2^{2212122122021} is an apocalyptic number.

It is an amenable number.

2212122122021 is a deficient number, since it is larger than the sum of its proper divisors (363823951867).

2212122122021 is an equidigital number, since it uses as much as digits as its factorization.

2212122122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46686968 (or 46686961 counting only the distinct ones).

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

Adding to 2212122122021 its reverse (1202212212122), we get a palindrome (3414334334143).

The spelling of 2212122122021 in words is "two trillion, two hundred twelve billion, one hundred twenty-two million, one hundred twenty-two thousand, twenty-one".