1135121031251 has 8 divisors (see below), whose sum is σ = 1163713282704. Its totient is φ = 1106571940480.

The previous prime is 1135121031139. The next prime is 1135121031263. The reversal of 1135121031251 is 1521301215311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1135121031251 - 2¹⁰ = 1135121030227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1135121031251.

It is not an unprimeable number, because it can be changed into a prime (1135121039251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10736906 + ... + 10842111.

It is an arithmetic number, because the mean of its divisors is an integer number (145464160338).

Almost surely, 2^{1135121031251} is an apocalyptic number.

1135121031251 is a deficient number, since it is larger than the sum of its proper divisors (28592251453).

1135121031251 is a wasteful number, since it uses less digits than its factorization.

1135121031251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21580341.

The product of its (nonzero) digits is 900, while the sum is 26.

Adding to 1135121031251 its reverse (1521301215311), we get a palindrome (2656422246562).

The spelling of 1135121031251 in words is "one trillion, one hundred thirty-five billion, one hundred twenty-one million, thirty-one thousand, two hundred fifty-one".