20401145122 has 32 divisors (see below), whose sum is σ = 31370385024. Its totient is φ = 9947616000.

The previous prime is 20401145111. The next prime is 20401145131. The reversal of 20401145122 is 22154110402.

It is a junction number, because it is equal to n+sod(n) for n = 20401145093 and 20401145102.

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, 7282122 + ... + 7284922.

It is an arithmetic number, because the mean of its divisors is an integer number (980324532).

Almost surely, 2^20401145122 is an apocalyptic number.

20401145122 is a deficient number, since it is larger than the sum of its proper divisors (10969239902).

20401145122 is a wasteful number, since it uses less digits than its factorization.

20401145122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 20401145122 its reverse (22154110402), we get a palindrome (42555255524).

The spelling of 20401145122 in words is "twenty billion, four hundred one million, one hundred forty-five thousand, one hundred twenty-two".