1222100232421 has 2 divisors, whose sum is σ = 1222100232422. Its totient is φ = 1222100232420.

The previous prime is 1222100232413. The next prime is 1222100232427. The reversal of 1222100232421 is 1242320012221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1113786840321 + 108313392100 = 1055361^2 + 329110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222100232421 - 2³ = 1222100232413 is a prime.

It is a super-3 number, since 3×1222100232421³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1222100232392 and 1222100232401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222100232427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611050116210 + 611050116211.

It is an arithmetic number, because the mean of its divisors is an integer number (611050116211).

Almost surely, 2^{1222100232421} is an apocalyptic number.

It is an amenable number.

1222100232421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222100232421 is an equidigital number, since it uses as much as digits as its factorization.

1222100232421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 1222100232421 its reverse (1242320012221), we get a palindrome (2464420244642).

The spelling of 1222100232421 in words is "one trillion, two hundred twenty-two billion, one hundred million, two hundred thirty-two thousand, four hundred twenty-one".