1225206384135 has 32 divisors (see below), whose sum is σ = 2023662071808. Its totient is φ = 632334773760.

The previous prime is 1225206384121. The next prime is 1225206384229. The reversal of 1225206384135 is 5314836025221.

It is not a de Polignac number, because 1225206384135 - 2¹⁹ = 1225205859847 is a prime.

It is a super-2 number, since 2×1225206384135² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12572959 + ... + 12670031.

It is an arithmetic number, because the mean of its divisors is an integer number (63239439744).

Almost surely, 2^{1225206384135} is an apocalyptic number.

1225206384135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1225206384135 is a deficient number, since it is larger than the sum of its proper divisors (798455687673).

1225206384135 is a wasteful number, since it uses less digits than its factorization.

1225206384135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124255.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 1225206384135 in words is "one trillion, two hundred twenty-five billion, two hundred six million, three hundred eighty-four thousand, one hundred thirty-five".