105521135402 has 4 divisors (see below), whose sum is σ = 158281703106. Its totient is φ = 52760567700.

The previous prime is 105521135381. The next prime is 105521135413. The reversal of 105521135402 is 204531125501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204531125501 = 19 ⋅10764796079.

It can be written as a sum of positive squares in only one way, i.e., 91265014201 + 14256121201 = 302101^2 + 119399^2 .

It is a super-2 number, since 2×105521135402² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26380283849 + ... + 26380283852.

Almost surely, 2^105521135402 is an apocalyptic number.

105521135402 is a deficient number, since it is larger than the sum of its proper divisors (52760567704).

105521135402 is an equidigital number, since it uses as much as digits as its factorization.

105521135402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52760567703.

The product of its (nonzero) digits is 6000, while the sum is 29.

Subtracting 105521135402 from its reverse (204531125501), we obtain a palindrome (99009990099).

The spelling of 105521135402 in words is "one hundred five billion, five hundred twenty-one million, one hundred thirty-five thousand, four hundred two".