251121141011 has 16 divisors (see below), whose sum is σ = 274593839520. Its totient is φ = 228268212480.

The previous prime is 251121140999. The next prime is 251121141023. The reversal of 251121141011 is 110141121152.

It is an interprime number because it is at equal distance from previous prime (251121140999) and next prime (251121141023).

It is a cyclic number.

It is not a de Polignac number, because 251121141011 - 2¹⁰ = 251121139987 is a prime.

It is a super-2 number, since 2×251121141011² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (251121146011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312650 + ... + 774591.

It is an arithmetic number, because the mean of its divisors is an integer number (17162114970).

Almost surely, 2^251121141011 is an apocalyptic number.

251121141011 is a deficient number, since it is larger than the sum of its proper divisors (23472698509).

251121141011 is a wasteful number, since it uses less digits than its factorization.

251121141011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087526.

The product of its (nonzero) digits is 80, while the sum is 20.

Adding to 251121141011 its reverse (110141121152), we get a palindrome (361262262163).

The spelling of 251121141011 in words is "two hundred fifty-one billion, one hundred twenty-one million, one hundred forty-one thousand, eleven".