25200121342 has 32 divisors (see below), whose sum is σ = 41459649120. Its totient is φ = 11392740480.

The previous prime is 25200121313. The next prime is 25200121351. The reversal of 25200121342 is 24312100252.

It is a happy number.

It is a super-2 number, since 2×25200121342² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6431568 + ... + 6435484.

It is an arithmetic number, because the mean of its divisors is an integer number (1295614035).

Almost surely, 2^25200121342 is an apocalyptic number.

25200121342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25200121342 is a deficient number, since it is larger than the sum of its proper divisors (16259527778).

25200121342 is a wasteful number, since it uses less digits than its factorization.

25200121342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5436.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 25200121342 its reverse (24312100252), we get a palindrome (49512221594).

The spelling of 25200121342 in words is "twenty-five billion, two hundred million, one hundred twenty-one thousand, three hundred forty-two".