20125221142 has 32 divisors (see below), whose sum is σ = 33667006464. Its totient is φ = 8959917600.

The previous prime is 20125221139. The next prime is 20125221167. The reversal of 20125221142 is 24112252102.

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, 210523 + ... + 290809.

It is an arithmetic number, because the mean of its divisors is an integer number (1052093952).

Almost surely, 2^20125221142 is an apocalyptic number.

20125221142 is a deficient number, since it is larger than the sum of its proper divisors (13541785322).

20125221142 is a wasteful number, since it uses less digits than its factorization.

20125221142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80644.

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

Adding to 20125221142 its reverse (24112252102), we get a palindrome (44237473244).

The spelling of 20125221142 in words is "twenty billion, one hundred twenty-five million, two hundred twenty-one thousand, one hundred forty-two".