20125221411 has 16 divisors (see below), whose sum is σ = 27582376608. Its totient is φ = 13043059200.

The previous prime is 20125221409. The next prime is 20125221449. The reversal of 20125221411 is 11412252102.

It is not a de Polignac number, because 20125221411 - 2¹ = 20125221409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20125223411) 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, 54331 + ... + 207851.

It is an arithmetic number, because the mean of its divisors is an integer number (1723898538).

Almost surely, 2^20125221411 is an apocalyptic number.

20125221411 is a deficient number, since it is larger than the sum of its proper divisors (7457155197).

20125221411 is a wasteful number, since it uses less digits than its factorization.

20125221411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154742.

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 20125221411 its reverse (11412252102), we get a palindrome (31537473513).

The spelling of 20125221411 in words is "twenty billion, one hundred twenty-five million, two hundred twenty-one thousand, four hundred eleven".