25402201121 has 16 divisors (see below), whose sum is σ = 29621628288. Its totient is φ = 21550108800.

The previous prime is 25402201117. The next prime is 25402201129. The reversal of 25402201121 is 12110220452.

It is not a de Polignac number, because 25402201121 - 2² = 25402201117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25402201093 and 25402201102.

It is not an unprimeable number, because it can be changed into a prime (25402201129) 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, 1214066 + ... + 1234811.

It is an arithmetic number, because the mean of its divisors is an integer number (1851351768).

Almost surely, 2^25402201121 is an apocalyptic number.

It is an amenable number.

25402201121 is a deficient number, since it is larger than the sum of its proper divisors (4219427167).

25402201121 is a wasteful number, since it uses less digits than its factorization.

25402201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448952.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 25402201121 its reverse (12110220452), we get a palindrome (37512421573).

The spelling of 25402201121 in words is "twenty-five billion, four hundred two million, two hundred one thousand, one hundred twenty-one".