1233421015155 has 32 divisors (see below), whose sum is σ = 2255506295808. Its totient is φ = 563822640000.

The previous prime is 1233421015153. The next prime is 1233421015213. The reversal of 1233421015155 is 5515101243321.

It is not a de Polignac number, because 1233421015155 - 2¹ = 1233421015153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1233421015153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2013825 + ... + 2553885.

It is an arithmetic number, because the mean of its divisors is an integer number (70484571744).

Almost surely, 2^{1233421015155} is an apocalyptic number.

1233421015155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1233421015155 is a deficient number, since it is larger than the sum of its proper divisors (1022085280653).

1233421015155 is a wasteful number, since it uses less digits than its factorization.

1233421015155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561827.

The product of its (nonzero) digits is 18000, while the sum is 33.

Adding to 1233421015155 its reverse (5515101243321), we get a palindrome (6748522258476).

The spelling of 1233421015155 in words is "one trillion, two hundred thirty-three billion, four hundred twenty-one million, fifteen thousand, one hundred fifty-five".