1223011426021 has 32 divisors (see below), whose sum is σ = 1598037350400. Its totient is φ = 907580393280.

The previous prime is 1223011426019. The next prime is 1223011426051. The reversal of 1223011426021 is 1206241103221.

It is not a de Polignac number, because 1223011426021 - 2¹ = 1223011426019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223011426051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1102251 + ... + 1913368.

It is an arithmetic number, because the mean of its divisors is an integer number (49938667200).

Almost surely, 2^{1223011426021} is an apocalyptic number.

1223011426021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1223011426021 is a deficient number, since it is larger than the sum of its proper divisors (375025924379).

1223011426021 is a wasteful number, since it uses less digits than its factorization.

1223011426021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015889.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 1223011426021 its reverse (1206241103221), we get a palindrome (2429252529242).

The spelling of 1223011426021 in words is "one trillion, two hundred twenty-three billion, eleven million, four hundred twenty-six thousand, twenty-one".