2544400020122 has 4 divisors (see below), whose sum is σ = 3816600030186. Its totient is φ = 1272200010060.

The previous prime is 2544400020121. The next prime is 2544400020137. The reversal of 2544400020122 is 2210200044452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2030166175921 + 514233844201 = 1424839^2 + 717101^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2544400020091 and 2544400020100.

It is not an unprimeable number, because it can be changed into a prime (2544400020121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636100005029 + ... + 636100005032.

Almost surely, 2^{2544400020122} is an apocalyptic number.

2544400020122 is a deficient number, since it is larger than the sum of its proper divisors (1272200010064).

2544400020122 is a wasteful number, since it uses less digits than its factorization.

2544400020122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272200010063.

The product of its (nonzero) digits is 5120, while the sum is 26.

Adding to 2544400020122 its reverse (2210200044452), we get a palindrome (4754600064574).

The spelling of 2544400020122 in words is "two trillion, five hundred forty-four billion, four hundred million, twenty thousand, one hundred twenty-two".