1221233542010 has 16 divisors (see below), whose sum is σ = 2198267872416. Its totient is φ = 488482861968.

The previous prime is 1221233542007. The next prime is 1221233542013. The reversal of 1221233542010 is 102453321221.

It is an interprime number because it is at equal distance from previous prime (1221233542007) and next prime (1221233542013).

It is a super-2 number, since 2×1221233542010² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221233542013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824564 + ... + 1767023.

It is an arithmetic number, because the mean of its divisors is an integer number (137391742026).

Almost surely, 2^{1221233542010} is an apocalyptic number.

1221233542010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221233542010 is a deficient number, since it is larger than the sum of its proper divisors (977034330406).

1221233542010 is a wasteful number, since it uses less digits than its factorization.

1221233542010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2638717.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 1221233542010 its reverse (102453321221), we get a palindrome (1323686863231).

The spelling of 1221233542010 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-three million, five hundred forty-two thousand, ten".